$\frac{\left(\left(x\cos h\left(t\right)+h\right)-h\right)^2}{x^2}$

$3y^2-y^2+4y-2y$

$\left(8a^3b-5ab^2\right)\left(-3a^2b+9ab^2-4\right)$

$x^2\frac{dx}{dy}=5y$

$\left(-5\right)x\left(-2\right)x\left(-3\right)x\left(2\right)$

$\lim_{x\to0}\left(\frac{\left(e^x-1\right)}{x\left(1+x\right)}\right)$

$\:\:\:\:\:\:\:\left(2x\:+\:3xy\:-5y\right)\:\left(7x\:-\:6y\:+\:8\right)$