$\left(2x+a^{2}\right)^{3}$
$2\left(10x+8a^2-b\right)$
$\left(2xy^2-3y^3\right)\left(2xy^2+3y^3\right)$
$\frac{\left(\sin\:\left(x\right)+\tan\:\left(x\right)\right)^2+\cos\:^2x-\sec\:^2\left(x\right)}{\tan\left(x\right)}$
$876+987$
$\frac{4x+7\left(500-x\right)}{500}\ge5$
$5-\left(-6\right).\left(-7\right)$
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