So lets say I do a 17 creature and 6 spell deck
I would tally up all mana pips even adding the doubles or triples in the equation
So lets say I have 14 red and 8 blue BC I have some colorless or w.e
What math do you do at that point to get to your mana base. For me my brain just says 10 red 7 blue but Idk how to say do it on a calculator
Again, it depends. Maybe you have several blue cards that cost UU
and that you want to cast ASAP, or your red cards have an average CMC of 3 or more. Maybe your red removal and combat tricks happen to be good enough that you can wait until later on in the game to cast them... basically, a simple spread would be around 10-7 or 9-8 depending on color-intensiveness, but you should try analyzing your deck as well as possible to avoid screwing yourself over as you wait for your islands to show up.
Oh, then there's also the thing about colorless-producing lands, since you've got to remember that they'll make all your color-heavy cards worse with each extra colorless land you have in your deck. Also, you should take note of mana costs in cards' abilities, since there're cards like that 2WW guy that could tap creatures down for WW, and that means you'll be needing a whole lot of white to get the most out of it.
Edit: Summing up, you want your mana base to work well with your game plan, and planning your game in advance is also a good way to notice bad picks. For example, if you want to play several copies of a good UU creature and then have a 1RR card that you want to cast right afterwards, you'll easily see that there's just no way (short of multicolor mana-fixing) to curve out with those two cards. In that case you should probably reconsider wether running both cards together is worth it, since even if you are okay with casting the 1RR card later on, you've got to remember that you'll be looking at two islands on the battlefield by T2, which means you've got to draw and play two mountains before you even get a chance to cast your 1RR cards.