$11x+4<4x+2$
$4.5\infty-0.455\infty$
$3xy+6x^2y+9xy^2$
$\frac{-cot\left(x\right)+tan\left(x\right)}{csc\left(-x\right)}$
$x+x^2+2x^3$
$\lim_{x\to0}\left(\frac{1-\cos^2\left(x\right)}{x^4}\right)$
$\frac{7x}{-9}<42$
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