$7x-10x-9x$
$3x^2-4\ge\:5$
$\sec\left(2a\right)-\tan\left(2a\right)$
$-2000+\left(-2400\right)+\left(-2273\right)$
$\int\arccos\left(x\right)\cos\left(2\right)dx$
$\lim_{x\to0}\left(\frac{1-cos\left(t\right)}{sin\left(t\right)}\right)$
$-5v^3w^2-12.3v^3w^2$
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