$\left(5\right)e^5-e^5$
$2ab-3a+c-9=10$
$\lim_{t\to0}\frac{\cos\left(3t-1\right)}{t^2}$
$3-2x\le\frac{1}{2}$
$\int\left(\frac{sec^2z}{tanz}\right)dz$
$3+\tan^2\left(x\right)=\frac{1}{\cos^2\left(x\right)}$
$4x^2-14\cdot2x+49$
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