$\frac{d}{dx}ax^2+bx-c$

$f\left(x\right)=\left(1+3^2\right)^{\frac{1}{2}}$

$1.9+1.2$

$\left(6a+4y\right)\left(4y+6a\right)$

$x^2+\:x-12\:=\:0$

$\lim_{x\to0}\left(\frac{e^x}{xe^x}\right)$

$\left(\frac{dy}{dx}\right)=\frac{\left(y\left(x+y\right)\right)}{\left(x\left(x-y\right)\right)}$