Evaluate
10x^{2}+9y-6
Differentiate w.r.t. x
20x
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10x^{2}+2y-6+7y
Combine 8x^{2} and 2x^{2} to get 10x^{2}.
10x^{2}+9y-6
Combine 2y and 7y to get 9y.
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