$\frac { x ^ { 2 } + 1 } { x + 2 } = 0$
$x^2-3x+72$
$\left(x-5\left(x+5\right)\right)$
$2x^2-3x+1=0$
$p6-0.0001$
$\frac{1}{\cos\left(x\right)}-\frac{\cos\left(x\right)}{12+\sin\left(x\right)}=\tan\left(x\right)$
$-7+-16+2$
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