Extract commands from a string?

[ujjain]

String => 100abc PLUdef gh 3MULkl(mn4 MINop5q)rMULs6t
result = 100+3*4-5*6 = 100+12-30 = 82.
rest = abc def gh kl(mn opq)rst

I need code that extracts both result and rest from this specific string.

Recommendations are very welcome!

[DreamShore]

1. a trick for PLU MUL things, since they are less than 4 chars, you can test them as int. like (*(int *)p & 0xFFFFFF) == 'LUM'. some compilers may not support multi-character literals though.

2. numeric character starts a number, non-numeric ones terminates one.