$\int\frac{x^2-3}{\sqrt{x-1}}dx$
$\left(42\right).\left(-23\right)$
$\lim_{x\to0}\frac{\left(\sqrt{1+\sin\:\left(x\right)}\right)-\sqrt{1-\sin\:\left(x\right)}}{x}$
$80a^2-5$
$x^2+4x-5x-2$
$\frac{2\left(x-1\right)}{x+2}<8$
$4\cos^2x+\sin x$
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