$\sqrt{147a^2}f^6$
$x^2-7x-6\ge0$
$5\left(2x+y-3z\right)$
$\left(a\:+\:2\sqrt{b}\right)^3$
$\frac{dx}{dy}=e^{2y}-x$
$-1.5+0.3$
$\frac{\tan a-\cot a}{\tan a+\cot a}=1-2\cos^2a$
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