$\left(3m+n^2\right)-5x^3\left(3m+n^2\right)-5x^3$

$\frac{dy}{dx}=\frac{y+3}{\cos\left(x\right)^2}$

$x\cdot8=3\cdot x+15$

$\frac{-1x^3-x+5x^2-15}{x-3}$

$x=3y-2$

$\frac{13}{12}-\frac{13}{12}$

$\frac{\left(\sqrt[6]{x}+1\right)}{\left(\sqrt[6]{x^7}+\:\sqrt[4]{x^5}\right)}$