Evaluate
54\left(ab\right)^{2}
Differentiate w.r.t. a
108ab^{2}
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2a^{2}\times 9b\times 3b
Multiply a and a to get a^{2}.
2a^{2}\times 9b^{2}\times 3
Multiply b and b to get b^{2}.
18a^{2}b^{2}\times 3
Multiply 2 and 9 to get 18.
54a^{2}b^{2}
Multiply 18 and 3 to get 54.
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