$\left(-6+4\right)-4+\left|3-\left(8+9-2\right)\right|$

$\frac{dy}{dx}-4xy=6x$

$\left(x+3\right)^2\left(x-2\right)^2-2x\left(x+1\right)$

$\frac{4s^{-5}}{7s^3}$

$x^2\ln\left(x\right)dx=\frac{\left(y+1\right)^2}{y}dy$

$\lim_{x\to0}\left(\frac{ln\:y}{e^y}\right)$

$\left(2x-7\right)\frac{1}{2}$