$2.\left(-1\right)+3\left(-2\right)$
$z^3+27=0$
$\san\left(1$
$cscx\left(1-cos2x\right)$
$\frac{2x-5}{3x}<\frac{5}{3x}$
$\left(xf+2\right)\left(x+3\right)$
$\int\:\frac{\left(ln\left(x\right)\right)^2}{x^{-3}}dx$
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