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3ab-a+b^{3}-b+729
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3ab-a+b^{3}-b+729
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729+b^{3}+3ab-\left(a+b\right)
Calculate 9 to the power of 3 and get 729.
729+b^{3}+3ab-a-b
To find the opposite of a+b, find the opposite of each term.
729+b^{3}+3ab-\left(a+b\right)
Calculate 9 to the power of 3 and get 729.
729+b^{3}+3ab-a-b
To find the opposite of a+b, find the opposite of each term.
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