I was yesterday days old when I learned there was a Fanuc Macro A format.

[riverhunter]

Makes sense that A came before B.......


O1000 (MACRO A EXAMPLE)
#101=0 (Initialize variable #101)
G65 H02 P#101 Q40000 R30000 (Add 4 + 3, store in #101)
M30 (End of program)

O2000 (MACRO B EXAMPLE)
#101 = 0 (Initialize variable #101)
#101 = 4 + 3 (Add 4 + 3, store in #101)
M30 (End of program)

[CNCAppsJames]

Or;
...
#101=[4+3]

My personal preference. 

I like to use brackets. They help me keep stuff straight even when they are not absolutely necessary... like your example.