Evaluate
1470y_{14}u^{7}
Differentiate w.r.t. y_14
1470u^{7}
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70u^{7}\times 21y_{14}
To multiply powers of the same base, add their exponents. Add 2 and 5 to get 7.
1470u^{7}y_{14}
Multiply 70 and 21 to get 1470.
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