関連ワード:  integral sec 3 tan 2    integral of sec 3 x tan 2 x    integral tan 3 2t sec 10 2t dt    integral tan 3 2x sec 2x dx    integral tan 3 2x sec 2x    integral tan 3 x sec 2 x dx    integral of tan 3 2x sec 5 2x dx    what is the integral of tan^2    integration of tan^2(2x-3)