Differentiate w.r.t. a
-68a^{3}
Evaluate
-17a^{4}
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\frac{\mathrm{d}}{\mathrm{d}a}(-17a^{4})
Combine -10a^{4} and -7a^{4} to get -17a^{4}.
4\left(-17\right)a^{4-1}
The derivative of ax^{n} is nax^{n-1}.
-68a^{4-1}
Multiply 4 times -17.
-68a^{3}
Subtract 1 from 4.
-17a^{4}
Combine -10a^{4} and -7a^{4} to get -17a^{4}.
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