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How do you do this math?

Combine the like terms to simplify the expression:

5 + 7 + 15xy2 + 9y3 + 10x –13xy2 – 3x – 8y3

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ellemacgregor

you stick the numbers together, the numberx, the number y, the number xy etc... so if the numbers are 5+6x-8y+12+4xy+8x+4y
youd go 5+12, -8y+4y, 6x+8x, and 4xy. then ya figure out what each of those are, so itd be 12-4y+14x+4xy. taadaaaa. Now you try with your numbers n comment if ya dont get it

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Thanks
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Just combine the ones that look the same. You know how to add and subtract don't you.

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yes and thank you
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