$1,7-5,82$
$x-4\ge2-2x^2$
$ni\:sin\left(60\right)\:=\:nr\:sin\left(40\right)$
$m\left(m+10\right)$
$3x^2\left(b-4\right)-2x\left(b-4\right)+5\left(b-4\right)$
$3\left(-2+5\right)-14$
$\frac{7x^2-3x+1}{x-1}$
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