$y''-y'-12y=0$
$x^2-x+2<0$
$\frac{1}{2}b^3f^2+3bf^2$
$\int\:\left(t\sqrt[4]{1-t^2}\right)dt$
$\left(5x^7+7x^5\right)\cdot\left(7x^7-5x^5\right)$
$\left(1-\cos\left(x\right)^2\right)\csc\left(x\right)\sec\left(x\right)$
$\frac{-x^5-3x^2-x^2+1}{-x^2+2x+1}$
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