$2r+2r$

$\lim_{x\to\infty}\left(\frac{x^m}{e^x}\right)$

$\left(5+x\sqrt{2}\right)^2$

$\int12t\left(3t^2-1\right)^3dt$

$\ln\left(y\right)=\ln\left(\frac{x^3}{3\sqrt{\left(1+x^2\right)^8}}\right)$

$\lim_{x\to12}\left(\frac{2x^2-5x-228}{x-4}\right)$

$\int x\left(3x+5\right)dx$