$x+x+x+\frac{1}{2}x$

$\lim_{x\to2}\left(\frac{x^2-9x+14}{x^2-49}\right)$

$\frac{dy}{dx}=\frac{xsecy}{ye^{t^2}}$

$\int7e^{8x-2}dx$

$\left(3+\sqrt{x}\right)\left(f\left(x\right)+2\right)^2\left(f\left(x\right)\right)^{'\:}=\frac{1}{\sqrt{x}}$

$3u+9+u$