$2x^2+13x-24=0$
$\:3secxtanx-5csc^2x$
$\int xb^{-3x}dx$
$\int_{-1}^0\left(\frac{x^3-4x+1}{\left(x-2\right)\left(x-1\right)}\right)dx$
$r=\left(x+5\right)^2+\left(x+3\right)^2-2\left(x+4\right)^2+1$
$25a^2+4+20a$
$8\cdot7\cdot6\cdot5$
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