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## Step-by-step Solution

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The derivative of a sum of two or more functions is the sum of the derivatives of each function

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$\frac{d}{dx}\left(9x^4\ln\left(x^4\right)\right)+\frac{d}{dx}\left(\ln\left(x\right)^5\right)$

Learn how to solve differential equations problems step by step online. Find the derivative (d/dx)(9x^4ln(x^4)+ln(x)^5) using the sum rule. The derivative of a sum of two or more functions is the sum of the derivatives of each function. The derivative of a function multiplied by a constant (9) is equal to the constant times the derivative of the function. Apply the product rule for differentiation: (f\cdot g)'=f'\cdot g+f\cdot g', where f=x^4 and g=\ln\left(x^4\right). The power rule for differentiation states that if n is a real number and f(x) = x^n, then f'(x) = nx^{n-1}.