$35y^2-7y$

$\lim_{x\to0}\left(\frac{2\sin\left(6x^4\right)}{5x}\right)$

$cos\:t\:cot\:t\:=\:\frac{1-sin^2\:t}{sin\:t}$

$\int\left(2+2x\right)e^{\left(x+1\right)}dx$

$\lim_{x\to0}\left(\frac{\sqrt{x^2-4}}{2x^2-8}\right)$

$\left(9k+2k\right)+\left(9+5\right)$

$890\:-x\ge410$