$2+\tan^2x+\sec^2x=2$

$\frac{1}{\csc^2x}+\frac{1}{\sec^2x}=\tan^2x$

$\lim_{w\to-2}\left(\frac{w^2+5w-6}{w^3+8}\right)$

$\left(2n+1\right)^2-2\left(2n+1\right)\left(n\right)+n^2$

$f^{\prime}\left(x\right)=-\frac{2x\times\sin\left(x^{2}\right)}{\cos\left(x^{2}\right)}+\frac{3x}{\sqrt{3x^{2}+2}}$

$6x-8x^3$

$\lim_{x\to8}\left(\frac{4}{x^8}-\frac{x^5}{2}\right)^{10}$