$5\left(x+3\right)\le3\left(x+7\right)$
$\left(45\right)\cdot\left(-10\right)-\left(5\right)\cdot\left(-40\right)$
$\left(a+1\right)^5$
$\lim_{x\to2}\left(2x\cdot\frac{\frac{1}{x}-\frac{1}{2}}{x-2}\right)$
$-6+0+-1+-3$
$\cos^2x-\cos x=2$
$\left(\frac{2\cdot4\sqrt{x^3}}{3\sqrt{y}}\right)^3\left(\frac{y^4}{\sqrt{x^{-1}}}\right)$
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