$2r-2\left\{4r-2\left[s-t+4\left(r-s+2t\right)-3r\right]+2s\right\}$

$\left(8^3\right)^5$

$\int\left(x+6\right)^{-5}dx$

$\frac{dy}{dx}+x^2y=0$

$3y^2+\left(12-5y^2\right)$

$f\left(x\right)=\frac{\left(2\sqrt{x}+\sqrt[3]{x}\right)}{\sqrt{x}}$

$\int\frac{1}{x^2-3x-10}\:dx$