$\lim_{x\to1}\frac{x^m-1}{x-1}$
$\left(6-4x+x^2\right)^2$
$4p^4-25$
$8x\:-\:4\:+\:6x\:+\:12y\:-\:2y$
$8x^2+-6x^3+7x$
$\lim_{x\to\frac{\pi}{2}}\left(\frac{\sin\left(x\right)-\cos\left(x\right)}{x-\frac{\pi}{4}}\right)$
$8\sqrt{x^4}y^2z^3$
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