$\int_0^{\frac{\pi}{2}}\left(\sec\left(x\right)^2\right)dx$

$\frac{d}{dx}x^7$

$\frac { 3 } { 3 } i ^ { 2 }$

$\frac{dy}{dx}=e^{\left(2x\right)}+e^{\left(-x\right)}+x$

$1+\left|\left(1+x^2\right)-1\right|$

$\frac{tanx+tany}{tan\left(x+y\right)}+tanxtany$

$\int\frac{\left(x^3+4x\right)}{x^4+8x^2-8}dx$