$\int e^{-7x}dx$
$\left|6,9\right|+2\left|3,2\right|-\left|-4,56\right|$
$5x^4-20x^2$
$13^7\cdot13^{-5}$
$3x^2-x-3=0$
$h^2+3h+12$
$g^1^0-100g^5v^5+100g^5$
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