$\int5\cos\left(\pi x\right)dx$

$\frac{\left(t^2+t\right)\left(t^2-t+1\right)}{t^4}$

$15\:+\:\left(6\:-\:18\:+\:11\right)\:-\:\left(7\:+\:15\:-\:19\right)\:+\:\left(1\:-\:3\:-\:6\right)$

$9\:-\:8.2\:-\:\left(-\:1.9\right)$

$\int\left(e^{3x}-e^{-4x}\right)^3dx$

$\frac{3x^2+x-5}{x+2}$

$\int\sec\left(ax\right)\cos\left(ax\right)dx$