$x2\:+\:7x\:=\:144\:+\:7x$

$\frac{dy}{dx}=\frac{5x}{1+2y}$

$\left[\left(-2\right)x\left(-4\right)x\left(2\right)x\left(+6\right)\right]$

$\int\frac{11x}{3x^2-5x-2}dx$

$\left(m+n-7\right)\left(m+n+7\right)$

$\left(2ab-3ac\right)^2$

$6p\:27\:\left(p\left(r+s\right)+p\:2\:+rs\right)$