$\lim_{x\to\infty}\left(\frac{\left(x^2+3x+7\right)}{x^3+7x^2+19}\right)$

$\left(3y^2-5y\right)^2$

$\int8e^{\cos\left(x\right)}\sin\left(x\right)dx$

$-7-\left(5+\left|-6-\left(3-2\cdot3\right)+1\right|-8\right)$

$\left(-2\right)\left(-4\right)\left(-2\right)$

$\left(2x-2\right)\left(2x+5\right)$

$2x^2-x-x-2x+4$