$\lim_{x\to\infty}\left(\frac{18x^2-3x+2}{2x^2+5}\right)$

$\frac{dy}{dx}=\left(y-4\right)^2$

$\left(1-\left(7-5\right)\right)-\left(1-\left(9-6\right)\right)-\left(1-\left(8+5\right)\right)$

$\int\left(x-5\right)^5\:dx$

$secb-\left(tanb\right)\left(senb\right)$

$\frac{5x^2y^2}{4xy^2}$