$\frac{x^5}{\left(\left(x-1\right)\left(x^2+x+1\right)\right)}$

$\frac{\sec\left(x\right)+\cos\left(x\right)}{1+\tan\left(x\right)}$

$\int-\frac{75}{x^2-10x+25}dx$

$y^2-5y-36$

$\left(\sqrt{x}+2\right)\left(\sqrt{x}-2\right)\left(x+4\right)+\left(x+4\right)\left(4-x\right)$

$49v^2-64$

$4x^2-12x+8$