$\frac{cos\theta\:\left(1-csc\theta\:\right)}{1-csc^2\theta\:}$
$b^2+26x=29$
$\sqrt[3]{64x^7y^{-6}}$
$f\left(x\right)=3x^2+2x-1$
$\int\frac{\sqrt{a^2-u^2}}{u^4}dx$
$\frac{-1}{\frac{0}{0}}$
$87.99-32$
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