This concept comes up in different kinds of problems, but one of the most common is with separable differential equations.

Read MoreSometimes you'll be given a sum of a short list of terms, and asked to collapse the series using summation notation.

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Sometimes you'll be given a sum in summation notation, and asked to expand the sum into a sum of individual terms.

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If math doesn’t come easily to you, you’re not alone. But with a bit of hard work (and sometimes a lot of hard work), I’m 100% convinced that you can do just as well as or better than your seemingly math genius classmates. They key is to put in the time and not give up.

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