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Evaluate
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Differentiate w.r.t. n
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7n^{2}+15-2
Combine 2n^{2} and 5n^{2} to get 7n^{2}.
7n^{2}+13
Subtract 2 from 15 to get 13.
\frac{\mathrm{d}}{\mathrm{d}n}(7n^{2}+15-2)
Combine 2n^{2} and 5n^{2} to get 7n^{2}.
\frac{\mathrm{d}}{\mathrm{d}n}(7n^{2}+13)
Subtract 2 from 15 to get 13.
2\times 7n^{2-1}
The derivative of a polynomial is the sum of the derivatives of its terms. The derivative of a constant term is 0. The derivative of ax^{n} is nax^{n-1}.
14n^{2-1}
Multiply 2 times 7.
14n^{1}
Subtract 1 from 2.
14n
For any term t, t^{1}=t.