$3^2+3^6$
$\frac{-7}{2}.\frac{2}{1}$
$-\frac{1}{2}\:.\:\left(4\:.\:5\:\right)$
$x^2-4x=5$
$\left|4+2\right|$
$410\cdot10^5$
$-1-2y$
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