$-7-83+42+31-9-3$
$50r^2-32r^2$
$\log_b\left(\frac{x^3y^2}{\sqrt{w}}\right)$
$\lim_{x\to1}\left(\left(x-1\right)\cdot\frac{e^{2x}}{x^3-17x^2+80x-64}\right)$
$\lim_{x\to0}\left(\frac{\sec\left(x\right)}{x\csc\left(x\right)}\right)$
$2x-3\ge9$
$3^2+4^2-5^2$
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