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$\frac{d}{db}\left(a^3+b-a+2b^2-b^3\right)$
Learn how to solve differential calculus problems step by step online. Factor the expression a^3+ba^2-ab^2-b^3-a^2b^2. Simplifying. The derivative of a sum of two or more functions is the sum of the derivatives of each function. Apply the product rule for differentiation: (f\cdot g)'=f'\cdot g+f\cdot g'. The derivative of the constant function (-1) is equal to zero.