$\int\frac{e^x\:tan\left(e^x\right)}{cos^2\left(e^x\right)}dx$

$3^2.\:3^{10}$

$\int\frac{2x}{\left(x-4\right)\left(x+2\right)\left(x+1\right)}dx$

$\lim_{x\to\infty}\left(\frac{x^2+2x}{x^2+1}\right)^x$

$\left(3x+9\right)^2=7$

$\left(3x^3y^4-5xy\right)^2$

$\lim_{x\to\infty}\left(\frac{x^4+3x}{3x^3-4x^2}\right)$