$2y^2-2y+1$
$24\left(\frac{1}{3}+\frac{1}{2}+\frac{1}{4}\right)$
$\lim_{x\to+\infty}\left(\frac{lnx+3x^2}{e^x-2x}\right)$
$x^2-8x+16-\left(x^2-12x+36\right)+20$
$\frac { 7 x ^ { 2 } + 3 x - 10 } { x ^ { 2 } - x + 10 }$
$\frac{cosx}{secx\:senx}$
$\left[\left(-a\right)^3\right]^{-3}$
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