$y^2-8y-20$

$x^2-6x+13$

$x^{\left(2\right)}\left(x\left(4x+1\right)\left(4x^{\left(2\right)}+2x-6\right)+3\left(2x^{\left(2\right)}+x-3\right)^{\left(2\right)}\right)$

$\sec^2x=-2\sec x$

$3u^3v^4-2u^5v^2\frac{+\left(u^2v^2\right)^2}{u^3v^2}$

$\int\frac{x^{2}}{\sqrt{6x-x^{2}}}dx$

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