$\lim_{x\to\infty}\left(\frac{x^2-7x+11}{5-x^3}\right)$

$\int\cos\left(-10y\right)\sin\left(3y\right)dy$

$256a^{12}-26a$

$\:\frac{x^{14}+2x^{10}+x+2x^4+x+3}{x-1}$

$67-\infty$

$\left(sin\left(2x\right)-cos\left(2x\right)\right)^2=2$

$\left(yx^{-2}\right)^3\left(2x^3y^{-1}\right)$