Differentiate w.r.t. x
-120x^{3}
Evaluate
-30x^{4}
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\frac{\mathrm{d}}{\mathrm{d}x}(-30x^{4})
Combine -15x^{4} and -15x^{4} to get -30x^{4}.
4\left(-30\right)x^{4-1}
The derivative of ax^{n} is nax^{n-1}.
-120x^{4-1}
Multiply 4 times -30.
-120x^{3}
Subtract 1 from 4.
-30x^{4}
Combine -15x^{4} and -15x^{4} to get -30x^{4}.
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