$t^2-t+7$
$\left(x+y^2\right)+\left(x+4\right)-6$
$3u+2u$
$15.471717839181153+15.474282155006435+15.475547844768045$
$5+5\left(2\right)\cdot\left(9-4\right)$
$676-\left(-240\right)$
$tres\:3\:eurs$
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