INPUT ARTICLE: Article: When a number has an exponent that means you multiply that number by itself as many times as the exponent says. To simplify any number that has an exponent simply multiply it the appropriate number of times.  For example: 43=4×4×4=64{\displaystyle 4^{3}=4\times 4\times 4=64}. If there is a negative sign and no parentheses, the exponent is simplified and then the negative sign gets added: −22=−(2×2)=−4.{\displaystyle -2^{2}=-(2\times 2)=-4.}  If there is a negative sign, but the number is in parenthesis, the negative number is part of the exponent: (−2)2=−2×−2=4.{\displaystyle (-2)^{2}=-2\times -2=4.} It may be confusing at first to see a variable with an exponent. Just remember, any variable with the same exponent number can be added or subtracted. If the letters are the same, but the exponents are different, they cannot be combined.  For example, 6x2+5x2=11x2{\displaystyle 6x^{2}+5x^{2}=11x^{2}}. Similarly, 4xy3−8xy3=−4xy3{\displaystyle 4xy^{3}-8xy^{3}=-4xy^{3}}. On the other hand, 5z+5z2{\displaystyle 5z+5z^{2}} cannot be simplified, since one variable has an exponent, and one does not. If two variables are being multiplied together and they both have exponents, you can add the exponents together to get the resulting exponent. This only applies to variables of the same letter. For example, (x2)(x3)=x2+3=x5{\displaystyle (x^{2})(x^{3})=x^{2+3}=x^{5}}. If you want to divide two variables that have exponents, simply subtract the bottom exponent from the top exponent. This only applies to variables that are the same letter. For example, a6a3=a6−3=a3{\displaystyle {\frac {a^{6}}{a^{3}}}=a^{6-3}=a^{3}}.

SUMMARY: Simplify exponents of numbers. Combine like terms with the same exponents. Add the exponents together when multiplying variables. Subtract the exponents when dividing variables.

In one sentence, describe what the following article is about: You can spot a molehill by finding fresh piles of dirt around your property. The tunnels will extend out from the molehill, so feel around the grassy area surrounding the molehill for spots that are softer to the touch or step. When you find a path of a tunnel, dig a deep hole going through, and underneath the tunnel. Dig deep enough under the tunnel to place a 2 to 5 gallon (7.6 to 19 liter) bucket under the tunnel runway. Pack soil around the bucket, and block the mole runways on each side of the bucket. This will cause the mole to continue digging and fall into the bucket as they break through the packed dirt. Cover the top of the dug out portion of the tunnel with sod or a large board to prevent sunlight from shining through to the tunnel. This will give the mole the sense that he is still digging underground even though the top of the tunnel has been disturbed and dug up. Remove the plywood or sod and check the hole every day to see if the mole has fallen into the bucket. If the mole has fallen into the bucket, you have successfully caught the mole.
Summary: Set a bucket under a tunnel. Cave in the sides of the tunnel way. Cover the dug out hole. Catch the mole in the bucket.

Pants can become waterlogged and make it more difficult to cross without getting swept away in the current. You also don't want to have soaked boots after you cross, so change into a spare set of shoes or sandals before you cross.  You also don't want to walk around in wet clothes because you can get hypothermia. Change into a spare pair of clothes so you can change back once you reach the other side of the river. The spare shoes should still fit snugly so they don't come off or trip you up while you're crossing. Unbuckle your hip belt and loosen the straps keeping your gear attached to you. If you fall, you need to be able to remove your gear before it fills up with water and drags you downstream in the current. No gear or equipment is worth risking your life over. A trekking pole or a sturdy stick about 5–6 feet (1.5–1.8 m) long can help increase your balance and provide another point of contact with the river bottom to help you cross the river more easily.
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One-sentence summary -- Change into shorts and spare sandals or shoes. Loosen your backpack and gear before you cross. Use a trekking pole or a sturdy stick for stability.

INPUT ARTICLE: Article: Get out a small bucket and pour 2 tablespoons (30 ml) of gentle dishwashing soap into it. Use a dishwashing soap that will cut through grease and grime. Pour 1 gallon (3.8 liters) of hot water into the bucket. Stir the mixture until it's soapy and combined. Dip a sponge or soft cloth into the soapy cleaning solution. Wipe the solution along the bottom and sides of the enamel tub. Gently scrub the tub to loosen any grime or soap deposits. Avoid using sponges that have an abrasive side, which could damage the enamel. Fill a clean bucket with clean water and pour it over the soapy tub to rinse it. You may need to fill the bucket a few times to remove all of the soapy residue. Wipe the tub dry.  You could also turn on the shower and direct the nozzle to rinse away the soap. If your shower head is a handheld model, this is the easiest way to rinse the bathtub. Since you'll be drying the tub immediately, you can use any temperature of water to rinse it. Remember to clean your tub at least once a week or more, if you use it more frequently. If you keep the enamel tub clean on a regular basis, it's less likely to develop stains or limescale buildup.

SUMMARY:
Mix hot water and liquid dishwashing soap. Rub the cleaning solution over the entire tub. Rinse the tub with clean water. Clean the enamel tub every week.