$\lim_{x\to\frac{\pi}{4}}\left(\frac{\left(sin\left(x-\frac{\pi}{4}\right)\right)}{x-\frac{\pi}{4}}\right)$

$2xym-6ymx-3myx$

$\left(pq\:+\:4\right)\:\left(pq\:-\:6\right)$

$\left(x+1\right)\cdot\left(x+0.502\right)\cdot\left(x-1\right)$

$16x^3+4x^2$

$3a^2b\left(5a^2b+11ab-5b^2\right)$

$xv^3+yv$