$1-x\ge2x+6$
$\left(-20\right)-\left(-5\right)$
$\arcsin\left(\cos\left(1\right)\right)-\arccot\left(\cot\left(4\right)\right)$
$10x\:^2\:+15x+4x+6$
$6x+2x^2\:si\:x=2$
$5ab\:\left(2ab\:-\:3b\right)\:$
$\int_{-2\pi}^{-\frac{5\pi}{2}}5\:cos\left(x\right)dx$
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