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Apply the product rule for differentiation: $(f\cdot g)'=f'\cdot g+f\cdot g'$, where $f=a+1$ and $g=\left(a-1\right)\left(a+2\right)\left(a-2\right)$
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$\frac{d}{da}\left(a+1\right)\left(a-1\right)\left(a+2\right)\left(a-2\right)+\left(a+1\right)\frac{d}{da}\left(\left(a-1\right)\left(a+2\right)\left(a-2\right)\right)$
Learn how to solve problems step by step online. Find the derivative of (a+1)(a-1)(a+2)(a-2). Apply the product rule for differentiation: (f\cdot g)'=f'\cdot g+f\cdot g', where f=a+1 and g=\left(a-1\right)\left(a+2\right)\left(a-2\right). Apply the product rule for differentiation: (f\cdot g)'=f'\cdot g+f\cdot g', where f=a-1 and g=\left(a+2\right)\left(a-2\right). Apply the product rule for differentiation: (f\cdot g)'=f'\cdot g+f\cdot g', where f=a+2 and g=a-2. The derivative of a sum of two or more functions is the sum of the derivatives of each function.