$46-\left(-12\right)$
$6\left(+x^3-3x^2-144x+440\right)$
$2\left(3x-4y\right)+5y-4\left(x+2y\right)+6x$
$8x^2-6y^2=4$
$3\cdot\left(4+1\right)$
$2-\frac{1}{\infty}$
$3\:.\:3$
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