$5-\frac{10}{x}>0$
$\frac{\sin\left(1-\sin^2a\right)}{\cos\left(1-\cos^2a\right)}$
$x+x^{-1}=3$
$\left(1+mn\right)^2$
$\int\frac{5x^3-4x}{81x^4-16}dx$
$\int\frac{3x-2}{x^2-12x-45}dx$
$\left(3m^2-m^3+m-1\right)-\left(6m^2-2m\right)$
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