complementary function to unapply()

[Han]

(03-31-2015 06:45 AM)leprechaun Wrote:  hello parisse! The thing is I already have a function f(x). What I want to achieve is to extract the expression under the function. I do not want to call all parameters.
If f(a,b,c,d,e):=a*b*c*d*e then a*b*c*d*e should be isolated. Adding a,b,c,d,e to any call is annoying. I hope it got clear what I mean and try to achieve.

In CAS view, type string(f) (in lower case) and you will get the expression as a string. Then just use the substring starting from the character after the first ">"