$\left(14\right)+\left(-32\right)+\left(8\right)+\left(-76\right)+\left(134\right)$
$1-b+2a-2ab$
$\left(7^4\right)^{20}$
$\frac{x_{-3}}{2}-\frac{x-2}{8}\le\frac{x}{2}$
$\frac{1}{x\cdot sin\left(x\right)}-\frac{1}{x\cdot tan\left(x\right)}$
$\left(4a-3y\right)^2$
$-x^2+13x+12$
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