$\left(-5\right)\cdot\frac{\left(-12\right)}{\left(\left(+5\right)\cdot\left(+2\right)\right)}$

$\frac{8x^3}{14x^2}$

$\frac{x^2+2ax+a^2}{mx+ma}$

$\int\frac{-2x+1}{\left(x^2+2x-5\right)\left(x+3\right)}dx$

$2\left[\left(74\:x\:3\:-\:15\right)\right]\:+\:\left(4\:x\:2\:+\:12\right)$

$\frac{d}{dx}\left(6x^2-2y^2=3\right)$

$\frac{dy}{dt}=cos\left(2t\right)y$