$345.67907\cdot1000$
$\int\frac{x+2}{\sqrt{-x^2-4x}}dx$
$x^4+10x^2+9$
$\left(x^2y^3-1\right)^3$
$-5\left(10-3\left(2-\left(6-7\right)\right)\right)$
$4\left(x+2\right)-3\left(x-5\right)x\:$
$\left(x\cdot3\right)-\left(x+1\right)\cdot2=4$
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