f(x) = x^ (SIN(x) + 7)
f(x) = EXP(LN(x^ (SIN(x) + 7)))
f(x) = EXP((SIN(x) + 7)·LN(x))
f'(x) = EXP((SIN(x) + 7)·LN(x)) · ((COS(x) + 7)·LN(x) + (SIN(x) + 7)·1/x)
f'(x) = x^{SIN(x) + 7} · (COS(x)·LN(x) + (SIN(x) + 7)·1/x)
f'(x) = x^{SIN(x) + 6} · (x·COS(x)·LN(x) + SIN(x) + 7)