Differentiate w.r.t. D
15D^{14}
Evaluate
D^{15}
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\frac{\mathrm{d}}{\mathrm{d}D}(D^{15})
Add 2 and 13 to get 15.
15D^{15-1}
The derivative of ax^{n} is nax^{n-1}.
15D^{14}
Subtract 1 from 15.
D^{15}
Add 2 and 13 to get 15.
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