$-9+7+5+2-6+8-4$
$\int\left(2\sin x+6\cos x\right)dx$
$\left(2m^2+3m^{-1}n^{-1}\right)^2$
$buym0zuy$
$3x^2-2x-2$
$2\cdot\left(\sec\left(\frac{\pi}{8}\right)+\csc\left(\frac{\pi\:}{8}\right)\right)$
$-3x+4-8x+2yx$
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