It stands for whatever you choose to assign to it.
You use variables to stand for numbers in algebra
P! / q!(p-q)!
khara
P x Q
Discrete Algebra and Geometry.
A. P. Mishina has written: 'Higher algebra' 'Abelian groups and modules' -- subject(s): Abelian groups, Modules (Algebra)
Difference of two squares.
8p-p-4p= 7p-4p= 3p
of Stand, imp. & p. p. of Stand.
First outer inner last(in that order).
P. L. Hammer has written: 'Pseudo-Boolean programming and applications' -- subject(s): Algebra, Boolean, Boolean Algebra, Congresses, Programming (Mathematics)
because god said so :P