
This font is Garamond written by mathtype. Is there a latex command that gives this. the command \usepackage[urw-garamond]{mathdesign}doesn't give the same font.

This font is Garamond written by mathtype. Is there a latex command that gives this. the command \usepackage[urw-garamond]{mathdesign}doesn't give the same font.
To be able to use Garamond with mathdesign you must have Garamond installed. Even if you have a complete working TeX installation you may still need to add the "non-free" fonts to get all of Garamond. See the instructions at the TUG site.
If you have not got the right font, then pdflatex will complain about not being able to read ugmr8a.pfb.
When you do have the right fonts installed, then you get Garamond like this:
\documentclass{article}
\usepackage[urw-garamond]{mathdesign}
\begin{document}
\noindent
We can write $\int_a^\infty(x-a)^2\,f(x)\,d\!x=\int_a^\infty\!\int_a^x
2(y-a)f(x)\, d\!y\,d\!x$.
\end{document}
Note that it won't look quite like the output produced by your "Mathtype" package. For example, as you can see TeX does not use the swash-form "y" in math mode, and the "x" character is slightly more respectable.

Notice that I manually added some negative space with \! and some positive space with \, in order to make "dy dx" look right in this font.