$4.9x^2-36.25x+10$
$\lim_{x\to1}\left(\frac{3\left(x-1\right)^2}{\left(x+1\right)^3}\right)$
$4x^2+x-14$
$\left(5x^2-3x\right)+2\cdot\left(2x^3+3x^2+4\right)$
$3\sin^2z$
$\frac{dy}{dx}=4y-x^3$
$\int\frac{400}{x\left(x^2+12x+40\right)}dx$
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