$\int8cos\left(5y+1\right)dy$

$2\frac{dy}{dx}+6y=50$

$2\left(2x+3\right)+2\left(3x-1\right)$

$10x\:-\:3y\:+\:9z\:=\:1$

$\frac{\left[2x-2\right]}{3}=\frac{\left[x+7\right]}{3}$

$\frac{6x^2y^3-18xy^4+5x^3y^2}{12x^2y^2}$

$\lim_{x\to-\infty}\left(\frac{4x^2+e^x}{2x^2-5x+1}\right)$