$81m^4\:n-3mn^4\:$
$-15\cdot5$
$6+\frac{24}{2}$
$y^2+3y-40\ge0$
$3+\left\{-1+5\right\}-3-\left\{-1-5\right\}$
$\int\frac{4x+4}{x^2+6x+8}dx$
$21-y=-4$
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