$\lim_{x\to0}\sqrt{\frac{4-x^2}{1+x}}$
$x+3=-34$
$2x^2+25\le75$
$3x+5<34$
$4\left(x^2+7x\right)^3$
$\frac{dy}{dx}=3y^2-60y$
$8\cos^2\left(30\right)-6\cos\left(60\right)+1$
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