TheIntegrandInTheLogarithm​(AngouriMath.​Entity,​AngouriMath.​Entity.​Variable,​System.​Boolean)

x^m sin(a + b ln(c x^n))^3 is e^((m + 1) t/n) sin(a + b t)^3 in t, which the
closed rule for an exponential times a trigonometric answers only when asked, and as the
substitution's integrand it is one level down: the cube was declined where the first and
second powers, which other rules answer, were not. The substitution is exact, so its integrand
is the question asked in another variable. Once: an integrand asked so does not lift its own
substitution again. Rubi's 4.7.5.
https://github.com/asc-community/AngouriMath/issues/718