$4\left(3+v\right)-v=6+3\left(v+2\right)$
$\frac{sin\left(a\right)}{1-cos\left(a\right)}-\frac{sin\left(a\right)}{1+cos\left(a\right)}$
$\frac{\left(1+cot^2\left(x\right)\right)}{sec^2\left(x\right)}+cos^2\left(x\right)+\left(\frac{1}{csc^2\left(x\right)}\right)$
$7x^5+5x^4+x^3$
$x-26<14$
$\frac{x^5}{x^{-9}}$
$\int_{-1}^{+\infty}\left(\frac{x}{1+x^2}\right)dx$
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