$100\left(x+y\right)^2$
$\left(-\infty.-7\right)$
$7-3\cdot4$
$\left(x+3\right)\left(2-5x\right)$
$\left(-8\right)-\left(+24\right)+\left(-18\right)-\left(-35\right)$
$\sqrt{\left(2x\right)}-1$
$\frac{x+1}{5}=2-\frac{4}{x}$
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