$\left(x+y\right)dx+\left(x-y-2\right)dy=0$

$\log\left(x^2\right)\left(ex\right)$

$-\left(\frac{9}{3}\right)\cdot\left[-2+\left[3\cdot\left(1-5\right)-\left(8-4\right)\right]\right]$

$\frac{dy}{dt}=\frac{1}{t\cdot\:\:y+t+y+1}$

$4y''-12y'+9y=0$

$-4n+8+9n-2$

$\log_a\left(b\right)+c\:\log_a\left(d\right)-r\:\log_a\left(s\right)$