$\left(4st+5s^2t^3-st^3\right)\left(-5st+4s^2t-7st^3\right)$

$0\:=\:3\:+\:v\:+\:\frac{1}{2}at^2$

$\frac{\sin\left(5x\right)+\sin2x}{\sin\left(5x\right)+\sin\left(x\right)}$

$3x+2x+3y\:-\:7y$

$-x^4y-x^2y+7xy-2;\:x=1,\:y=2$

$\lim_{x\to256}\left(\frac{1}{-16}-\frac{32}{x-256}\right)$

$\left(-2xy^2\right)^5\left(\frac{x^2}{8y^3}\right)$