$\left(3xy^5\right)+\left(2x\right)\left(3y^5\right)-\frac{20x^2y^7}{2y^2}$

$\int\left(1-9x\right)^2dx$

$g\:=\:20\:log\left(10v\right)$

$x^2-3x-1638=0$

$\frac{dy}{dx}=\frac{\left(x-1\right)\left(y+2\right)}{\left(x+2\right)\left(y-1\right)}$

$\sqrt{162x^3y^2}$

$\frac{x+2}{2x+6}\:+\frac{8}{x+5}$