Formula_7275

\[\begin{gathered}L\left(-i h \partial_{t},-i h \partial_{x}, x, t, h\right) u= \\=h A_{2}\left(x, t, u,-i h \partial_{t} u, \ldots,\left(-i h \partial_{x}\right)^{m_{2}} u, h\right)+ \\+h^{2} A_{3}\left(x, t, u,-i h \partial_{t} u, \ldots,\left(-i h \partial_{x}\right)^{m_{3}} u, h\right)+\ldots,\end{gathered}\]