$\left(2s^2+2st+t^2\right)ds+\left(s^2+2st-t^2\right)dt=0$

$\int_{-3}^4e^{-\left(2x-3\right)}dx$

$f\left(x\right)=\left(4x^{5}+3x^{2}\right)^{13}$

$x\:=\:-\:1512\cdot\sin\left(y\right)$

$\frac{x}{5}\cdot\frac{3}{5}$

$x'=x^2\left(x^2+x-2\right)$

$\int_1^3\:\frac{x^3}{\sqrt{2x^2+7}}dx$