$x^2+5x\ge0$
$-3\pi+w=2\pi$
$5m-2n+5m-2n+3b-2a-3b+3a$
$\int x\sqrt{x^4+9}dx$
$\frac{20x^3+46x^2+19x+4}{5x+4}$
$3+x-1-\left(x-4\right)$
$y = 3 x ^ { 3 } + \frac { 6 } { x ^ { 2 } }$
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