Evaluate
6x^{4}+7x^{3}+26x^{2}-55x+22
Differentiate w.r.t. x
24x^{3}+21x^{2}+52x-55
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6x^{4}+7x^{3}+26x^{2}-55x+25-3
Combine -25x and -30x to get -55x.
6x^{4}+7x^{3}+26x^{2}-55x+22
Subtract 3 from 25 to get 22.
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