$\int\frac{1}{25e^{-5x}+e^{5x}}dx$

$m^2-5m+6$

$\left(2x^3+6x\right)\left(2x^3+6x\right)$

$\int8xe^{x^2}dx$

$\frac{dy}{dx}+2xy=\left(4x-2\right)e^{-x^2}$

$6x+15y+3\left(11-\left(x+y\right)\right)+4\left(9-x\right)+20\left(10-y\right)+5\left(x+y-4\right)$

$5x^3-6x^2+2x^2-3$