$ln\left(\frac{x^2+6x+5}{x^2-10x+25}\right)$

$49x^2-25y^2$

$\frac{x^{-3}\cdot y^{-1}\cdot z^{-1}}{2x^{-3}\cdot y^{-1}}^2$

$\int\frac{2x}{x^2-16}dx$

$\frac{3y-2x}{\sqrt{3y}-\sqrt{2x}}$

$\left(2a+3b\right)\left(2a-3b\right)=4a^2+\left(-6ab\right)+\left(6ab\right)+\left(-9b^2\right)$

$x\left(x-2\right)>3$