$\frac { 3 x ^ { 4 } - 5 x ^ { 2 } + 2 } { 3 + x ^ { 3 } }$
$2x^3y^2+9x^2y^3+10x^3y^2-5x^2y^3$
$serie\:\frac{1}{x^2}$
$x^2+x-10100$
$\frac{dy}{dx}=-2\sqrt{y}$
$\lim_{x\to1}\left(\frac{3}{x^3-1}-\frac{1}{x-1}\right)$
$-1-x+2a-2ax$
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