Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$7 { x }^{ 3 } -5 { y }^{ 2 } +7$$

Evaluate

$7x^{3}-5y^{2}+7$

Differentiate w.r.t. x

$21x^{2}$

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