When digit fractions align environment, this goes with a size \displaystyle. But I want the size is like the one shown in a paragraph. I tried with \scriptstyle but I get letters too small and the ...
I'm using the commath package for its nice \od and \pd functions, but I find it uses \tfrac internally. It seems to have an 'if-then' clause to sometimes use \dfrac but it never does so in my tests: ...