$\frac{\left(x^2+x-2\right)}{x^2-3x+2}$

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

$7\left(x-2\right)+5\left(3-2x\right)>4\left(3-x\right)$

$\int_1^3\left(\frac{4\left(x^2+1\right)}{x^2}\right)dx$

$y^2-y-30$

$100x^2-109x+9$