Answer :
A few examples:
4x+5y
1232x + 564y + 5354z - 7642 a
Basically any number with a variable that you can not use again.
4x+5y
1232x + 564y + 5354z - 7642 a
Basically any number with a variable that you can not use again.
You can just do a simple 3 + n or x - 22 because expressions don't have an equal sign.