$\sqrt{-1}^2$
$-12a-8a+4a+a-2+7$
$1-4z^2$
$\sec\left(x\right)=1.0515$
$5x-11=2x+10$
$x^2-4x+3\le0$
$\frac{27x^2y^{-3}}{8x^{-4}y^3}$
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