Output Problem

[Edward Q]

Hello,

I am using Maxima to recursively apply a differential operator to a function that is initially unspecified. Despite using the "expand" command the final result involves a nest of derivatives applied to bracketed expressions. Does anyone know of a way to force Maxima to apply the derivatives through the brackets? In Mathematica the "expand" command would do this automatically. The brackets remain even when a specific function is substituted into the result.

thanks,

Edward