$2x-1<7$
$\sin\left(\cot+\tan\right)=\sec$
$4x-9x+10=20$
$4\int\left(\frac{1}{3+cos\left(x\right)}\right)dx$
$x^2+8x-25$
$\int4x^2e^{6x^3}dx$
$\lim_{x\to0}\left(\frac{\sqrt{4-x^2}-\left(x-2\right)}{x^2-4}\right)$
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