$x^2+3x+6=0$

$\left(2a^2b^3+3x^3y\right)\left(2a^2b^3-3x^3y\right)$

$x^8+5x^4+4=\left(x^4\:+4i\right)\left(x^4-i\right)$

$f\left(x\right)=\sqrt{x}\left(\sqrt{6}+5x\right)$

$2\left(x+1\right)+4>5\left(x-2\right)+7$

$2\sin^2\left(a\right)-3\sin\left(a\right)-2=0$

$\sqrt{20s^2t^9}$