$x^2-12x+27=0$

$\int\frac{1}{u\left(u-1\right)}du$

$\lim_{x\to\frac{\pi}{4}}\left(\frac{\cos\left(x\right)^2}{1-\sin\left(2x\right)}\right)$

$4x^2-28x+25$

$\left(x+3y-2z\right)+\left(5x+9y+c\right)+\left(-4x-9y+5c\right)$

$\sin2\left(x\right)=-\frac{\sqrt{2}}{2}$

$\int e^{-4x}sinxdx$