$2^2-3+2-\frac{4}{2}-3$
$x^2+4x=13$
$8x<x+56$
$\frac{31}{1}$
$-2\:\left(-4\right)\left(-1\right)+7\left(4\right)\left(-2\right)+\left(-1-2\left(6+1-8\right)\right)$
$\int\ln\left(2q^2\right)dq$
$\frac{1}{25}x^2-81$
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