$\frac{1}{1-sin}+\frac{1}{1+sin}$
$\frac{-t^3+3t^2-9t}{-t}$
$x^{-\frac{3}{4}}$
$-1-3+6+9+6+3-\left(-8\right)-4$
$0=8x-x^2$
$\int\left(1+15x^2\right)^{-1}dx$
$\int\left(te^{\frac{1}{3}}\right)dt$
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