$2\left(4\right).2\left(5\right)$
$2-4q\:$
$\sqrt[2]{3}.\sqrt[2]{3}$
$28-\left(-57\right)$
$1x^2-1x-6$
$2\log\left(x-2\right)+3=7$
$x^2-1-2^3$
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