$\frac{34}{4}+x^2+5x-\frac{25}{4}+\frac{3}{x-2}$
$\frac{a^2-100b^2}{a+10b}$
$x^2-0.5x$
$9\tan+10=0$
$\cos\left(a\right)^2-\sin\left(a\right)^2=2\cos\left(a\right)^2a-1$
$\frac{\sqrt{-sin^2x+1}}{\sqrt{tan^2x+1}}\:$
$\left(n+2\right)^3\left(n-2\right)^3\left(n^2+4\right)^3$
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