I want to write a math equation that needs power of dots. I tried these code
{2^{2^{2^{\ddots^{2}}}}}
But the dots needs to be rotated
[Tex/LaTex] Rotation in \ddots
math-modesymbols
Related Solutions
If you need to typeset actual numbers (and not symbols as in your example), you could use the \num macro provided by siunitx. It allows you to type \num{2e3} to output 
, both in math and in text mode.
When multiplying numbers in exponential form, you could reduce the spacing within the numbers, using tight-spacing=true:
\documentclass{article}
\usepackage{siunitx}
\begin{document}
\sisetup{tight-spacing=true}
\[
g = \frac{\num{6.67e-11} \times \num{6e24}}{6400010^2}
\]
\end{document}
Here are 3 more script fonts for which there exists a LaTeX package (in math mode): Dutchcal(from the esstix 13 font), Boondox (from the stix fonts) (two variants) and Adobe's Bickham. All exist in regular and boldface. The following code allows to test them, commenting and uncommenting the relevant lines:
\documentclass[12pt]{article}
\usepackage[utf8]{inputenc}
\usepackage{dutchcal}
%\usepackage{boondox-cal}
%\usepackage{boondox-calo}
%\usepackage{bickham}
\pagestyle{empty}
\begin{document}%
\textbf{Dutchcal: }
%\textbf{boondox-cal}
%\textbf{boondox-calo}
%\textbf{bickham}
$ \begin{array}[t]{c@{\quad}c}
\verb+ \mathcal + & \verb+ \mathbcal + \\[6pt]
\mathcal{E} & \mathbcal{E}
\end{array} $
\end{document}
Best Answer
Adapted from The TeXbook, Exercise 18.45: