$\left(\frac{-2d^{11}f^6}{c^{18}}\right)^2$

$2x^2-2+1$

$\lim_{x\to-\infty}\left(\frac{x^8-25}{x-7}\right)$

$\lim_{x\to2}\left(\frac{x^2-4x^3+4x^2}{x-2}\right)$

$\frac{-11}{16mn}-\frac{7}{16mn}$

$p\left(x\right)=\left(x^4-2\:x^2+2\right)\:\left(x^2-2x+3\right)$

$x^2-10x<200$