$$f(x)=\int_{-\infty}^x e^{-t^2}dt$$ \[ \left( {52 + \frac{{13}}{5}\sqrt[2]{{8 - x}}} \right) - \left( {14 - \frac{a}{b}} \right) \] $\sqrt{1-x^2}$ $$x^2 - 4x^2 - 11x + 30$$
$$\sum_0^n 2^{-n}$$
$$\sum_0^\infty (-1)^nx^n/n!$$
$$ \lim_{z\rightarrow z_0} f(z)=f(z_0)\ $$ $$\sum_0^\infty x^n/n$$
$$\sum_{m=1}^\infty\sum_{n=1}^\infty\frac{m^2\,n} {3^m\left(m\,3^n+n\,3^m\right)}$$
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