$\lim_{x\to0}\left(5x-11\right)$
$tanx+2sin^2x=tanx$
$\int_1^{x^2}e^{t^2}dt$
$y^2-18y+81$
$\left(x+3\right)^2-\left(x-3\right)^2-3\left(2x-1\right)$
$4f+4f+4g$
$\frac{d^2}{dx^2}\left(6x^5-5x^4-13\right)$
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