$4\int\left(\frac{x^2}{x^3}\right)dx$

$\cos\left(y\right)^2-\sin\left(y\right)^2+\sin\left(3y\right)$

$x\sqrt{\frac{x}{2}}$

$\lim_{x\to\infty}\left(\frac{x}{x^2+4}cos\left(x\right)\right)$

$1000\int_8^{10}y\left(4-y^2\right)^{\frac{1}{2}}dy$

$\left(7x^2+7\right)\left(7x^2-7\right)$

$2\sqrt{3451^2}$