$\frac{1+2\cos x}{2}=1$
$3ax-3x+4y-4ay$
$\int\left(\frac{1}{3+\sqrt{x+2}}\right)dx$
$\log3\left(243\right)$
$1.067^{18}$
$3\left(2a+5\right)$
$\int\:x^3e^{-3x^4}dx$
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