$6x^2+47x+35$

$\left(\frac{\cos\left(x\right)}{\sin\left(x\right)}-\frac{1}{\sin\left(x\right)}\right)^2=\frac{1-\cos\left(x\right)}{1+\cos\left(x\right)}$

$\lim_{x\to1}\left(\frac{x^3-3x+2}{1-x+inx}\right)$

$\sqrt{xy}\left(2x\right)$

$\left(x+y\right)\cdot\left(x\right)$

$x^2+2\ge0$

$9w^2+12w+4$