$2x^2+5x-3$

$x^5e^x^2$

$\:2x\:+\:9\:=\:33\:-x\:$

$y'\cdot\:\left(1+e^y\right)=e^{x-y}$

$sin\left(4x\right)cos\left(x\right)+cos\left(4x\right)sin\left(x\right)=\frac{\sqrt{3}}{2}$

$9\sin^2\left(x\right)-2=0$

$\left(\frac{x^2y}{2}+y\right).\left(\frac{x^2y}{2}-y\right)$