$x^4-144$
$25b^2+35b^4-45b^5$
$2sin\left(112.5\right)cos\left(112.5\right)$
$\int2x\left(x^2+5\right)^{12}dx$
$4\:+\:36\::\:9\:-\:50\::\:\left[12\:+\:\left(17\:-\:4\right)\right]$
$9a^2-16b^2-3a-4b$
$\frac{\left(4x^2-\:9m^2\right)}{2x\:-\:3m}$
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