Integral(tan^2)(x+4)dx =

Integral tan²(x+4) dx
Misal
u = x +4
du = dx
Integral tan²(x+4) dx
= integral tan²u du
= integral (sec²u -1) du
= integral sec²u du - integral du
= tan u - u + C
= tan (x+4) - x - 4 + C
= tan (x+4) - x + K