MathType is a good piece of software as it allows to integrate LaTeX code into MS Word documents, but recently I encountered a problem using “Toggle TeX” option with large equations in MS Word 2010 (in both .doc and .docx formats). As for example, I can’t “Toggle TeX” equation of this size (Toggle Tex option merely doesn't work on the LaTeX code presented below):

\[\begin{align}

\beta^{\top}\Delta x_{t} &= \beta^{\top}\alpha\beta^{\top}x_{t-1}

+ \beta^{\top}\varepsilon_{t} \\

\beta^{\top}x_{t} &= \beta^{\top}x_{t-1}

+ \beta^{\top}\alpha\beta^{\top}x_{t-1}

+ \beta^{\top}\varepsilon_{t} \\

&= (I + \beta^{\top}\alpha)\beta^{\top}x_{t-1}

+ \beta^{\top}\varepsilon_{t} \\

&= (I + \beta^{\top}\alpha)

[(I + \beta^{\top}\alpha)\beta^{\top}x_{t-2}

+ \beta^{\top}\varepsilon_{t-1}]

+ \beta^{\top}\varepsilon_{t} \\

&= (I + \beta^{\top}\alpha)^{2}\beta^{\top}x_{t-2}

+ (I + \beta^{\top}\alpha)\beta^{\top}\varepsilon_{t-1}

+ \beta^{\top}\varepsilon_{t} \\

&= (I + \beta^{\top}\alpha)^{2}

[(I + \beta^{\top}\alpha)\beta^{\top}x_{t-3}

+ \beta^{\top}\varepsilon_{t-2}]

+ (I + \beta^{\top}\alpha)\beta^{\top}\varepsilon_{t-1}

+ \beta^{\top}\varepsilon_{t} \\

&= (I + \beta^{\top}\alpha)^{3}\beta^{\top}x_{t-3}

+ (I + \beta^{\top}\alpha)^{2}\beta^{\top}\varepsilon_{t-2}

+ (I + \beta^{\top}\alpha)\beta^{\top}\varepsilon_{t-1}

+ \beta^{\top}\varepsilon_{t}

\end{align}\]

But everything works fine with equations of smaller size like this:

\[\begin{align}

\beta^{\top}\Delta x_{t} &= \beta^{\top}\alpha\beta^{\top}x_{t-1}

+ \beta^{\top}\varepsilon_{t} \\

\beta^{\top}x_{t} &= \beta^{\top}x_{t-1}

+ \beta^{\top}\alpha\beta^{\top}x_{t-1}

+ \beta^{\top}\varepsilon_{t}

\end{align}\]

or

\[\begin{align}

& \beta^{\top}x_{t} = \beta^{\top}x_{t-1}

+ \beta^{\top}\alpha\beta^{\top}x_{t-1}

+ \beta^{\top}\varepsilon_{t} \\

& \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \,

= (I + \beta^{\top}\alpha)\beta^{\top}x_{t-1}

+ \beta^{\top}\varepsilon_{t}

\end{align}\]

I do not experience any problems copy-pasting latex code for any size equation into MathType window directly – equations appear as they should. Limitation occurs only working with Toggle TeX option.

Is there any way to use Toggle TeX with large equation sets as above or not? Maybe there are certain limitations in the size of equation that you can “toggle tex”. Your help is appreciated.