$-31\cdot\left|63-72\right|$
$\sin^3a\cos b+\sin^2a$
$9x^2=25$
$\frac{2}{5}x^5-\frac{6}{5}x^4+\frac{14}{15}x^2$
$\lim_{x\to0}\left(\frac{\cos\left(4x\right)-1}{x\tan\left(3x\right)}\right)$
$4.5\:x\:10\:6$
$-10.7v^3w^2-12.3v^3w^2$
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