Evaluate
7x^{2}+2x-2y
Differentiate w.r.t. x
14x+2
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5x^{2}+2x+2x^{2}-2y
Combine -3x and 5x to get 2x.
7x^{2}+2x-2y
Combine 5x^{2} and 2x^{2} to get 7x^{2}.
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