$-1-\left(-8-9-13\right)+\left(-9-18-3\right)-19$
$1-2i^2$
$\left(3m+2\right)\left(3m-2\right)$
$-\arcsin\:\left(\frac{1}{4}x\right)+\frac{x}{\left(16-x^2\right)^{\frac{1}{2}}}$
$3x+2>\frac{1}{3}-x$
$12x+11^2$
$2x+3^2-2x+3^2$
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