$\left(2-3\right)+\left(32-81\right)$

$\frac{2sin^2\left(x\right)+3cos\left(x\right)-3}{sin^2\left(x\right)}=\frac{2cos\left(x\right)-1}{1+cos\left(x\right)}$

$\frac{dy}{dx}\:-2y=e^{2x}$

$\lim_{x\to\infty}\left(\frac{4x^2+2}{5x^3+8}\right)$

$\int_{z}^{2}5^{\frac{x}{2}}dy$

$p\left(-3\right)=2x^4+4x^3-6x^2+6$

$\frac{35}{14.5}$