Evaluate
4ax-8x-5a^{2}+4a+4
Differentiate w.r.t. x
4\left(a-2\right)
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3a+4-5a^{2}+a+4ax-8x
Add -6 and 10 to get 4.
4a+4-5a^{2}+4ax-8x
Combine 3a and a to get 4a.
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