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

$f\left(x\right)=e^{2x-x^2}$

$\int_4^5\left(\frac{2x^3-4x}{x^4-16}\right)dx$

$\left(y+x+2\right)\left(e^{\frac{1}{2}x^2+2x}\right)$

$\int\left(x^3\sqrt{25+4x^2}\right)dx$

$\frac{d}{dx}\left(4x\right)^{8x}$

$\csc\left(x\right)\csc\left(x\right)\tan\left(x\right)\tan\left(x\right)$