$\left(3s\right)^2-2\cdot3s\cdot5t^2+\left(5t^2\right)^2$

$x\frac{dy}{dx}+y=-8xy^2$

$-4\cdot32$

$1\:=\:sec^2x\left(\:1\:-\:sin^2x\right)$

$\lim_{x\to\infty}\left(\frac{\sqrt{2x^2-10x+12}}{4x-8}\right)$

$\left(x^{2}-15x+56\right)+\left(x-8\right)$

$.6=sin\left(\frac{\pi}{4}x\right)$