$9r^2-4r+1$
$\frac{d}{dx}16x^2+y^2-64x+6y-57=0$
$\int\left(x+1\right)^2\cdot\sqrt{3+x}dx$
$\int\frac{sen\left(2x\right)}{sen\left(x\right)}dx$
$csc^26x-csc6x$
$\int\frac{x-6}{\left(x+3\right)\left(2x-5\right)}dx$
$\lim_{x\to0}\left(\frac{x}{\sqrt{x^3+1}}\right)$
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