IntegrateChangeVariables

IntegrateChangeVariables[integral, u, trans] changes the variable in integral to the new variable u using the transformation trans.

IntegrateChangeVariables[integral, {u, v, ...}, trans] changes the variables to the new variables u, v, ....

Examples

IntegrateChangeVariables[Integrate[Sin[x]^2, x], u, u == Sin[x]]

IntegrateChangeVariables[Integrate[x^2 Exp[x^3], x], u, u == x^3]

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