Exercise calculus.differentiation.quotient

Description
Use the quotient-rule to find the derivative of a polynomial. Only remove parentheses in the numerator.

((x^2+1)*D(x) (2-x)-(2-x)*D(x) (x^2+1))/(x^2+1)^2+D(x) (2*x^3)
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Path 1

path[0, 2, 5, 1]
steps4
major rules2
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