[texhax] About MathTex

[Nimble Song]

Hi,
	This Day,I found some Latex math expression can`t parses when I use the Matex cgi.
Here is some example of those latex math expression.And I will be happy if you can reply me as soon as possible .
	Thanks!

Nimble

e.g.1:
\[{{\mathbf{u}}^\operatorname{s}}=\left\{\begin{gathered}{f_1}(t)(z-H)\hfill\\{f_4}(t)z\hfill\\\end{gathered}\right\}+\left\{\begin{gathered}{f_3}(t)\hfill\\{f_2}(t)\hfill\\\end{gathered}\right\}\]


e.g.2:
\[{{\mathbf{G}}_1}=\left\{\begin{gathered}{G_{11}}\hfill\\{G_{12}}\hfill\\\end{gathered}\right\}=\left\{\begin{gathered}{C_w}\hfill\\C_v^wA-1\hfill\\\end{gathered}\right\},{{\mathbf{G}}_2}=\left\{\begin{gathered}{G_{21}}\hfill\\{G_{22}}\hfill\\\end{gathered}\right\}=\left\{\begin{gathered}{C_w}\hfill\\C_v^wB-1\hfill\\\end{gathered}\right\}\]