$\left(-2m+1\right)\left(-2m-3\right)$

$\left(1+\tan^2\left(a\right)\right)^2+\left(1-\tan^2\left(a\right)\right)^2$

$\lim_{x\to\infty}1\left(\frac{2x^3-2x^2+x-3}{x^3+2x^2-x+1}\right)$

$\frac{3x}{7}=21$

$\left(3x^2-4\right)^3$

$p\left(x\right)=\frac{x^2+3x+2}{x^2-3x+2}$

$2x^2+7x+1=0$