$f ( x ) = \frac { 1 } { x ^ { 2 } - 10 x + 25 }$

$4\frac{x^3+7x+9}{2x+1}$

$9k^2-1$

$\frac{dy}{dx}=\frac{3x^3-e^x}{2y^3}$

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

$\sqrt{24^2+7^2}-3^2$

$\cot\left(x\right)\sin\left(x\right)-\sin\left(\frac{\pi}{2}-x\right)+\cos\left(x\right)$