Maxima Function
dpart (expr, n_1, ..., n_k)
Selects the same subexpression as part
, but
instead of just returning that subexpression as its value, it returns
the whole expression with the selected subexpression displayed inside
a box. The box is actually part of the expression.
(%i1) dpart (x+y/z^2, 1, 2, 1); y (%o1) ---- + x 2 """ "z" """