Need help with poker MDF/RE math for facing 3B

MDF:
pot size / (pot size + bet size)
RE:
call size / (pot size + bet size + call size)

So this all is basic but the issue i am having is when it concern calculating for 3bets.
For instance, calculating for Required equity, would 'bet size' be the size of the 3 bet or the size left after subtracting what the 3bettor would have to call first before putting in a raise(additional bet)?

ex.
sequence:
pot = 1.5 bb
rfi = 3 bb
3B = 9 bb

3bettor turn
pot = 4.5 bb
3bettor would first call 3 bb and raise it 6 more bb.

So would the math be:
6 / (7.5 + 6 + 6)
call / (pot + bet + call)

or
9 / (4.5 + 9 + 6)
bet / (pot + bet + call)


which is correct?

When facing a raise you calculate your own odds adding Villains call to the pot size, so in the case of the 3-bet the pot is 1,5BB + 2 x 3BB = 7,5BB. However when calculating MDF the important is, how often Villains bluff need to work to be profitable, and since he is risking a full 9 BB by 3-betting, your MDF becomes lower.

However before the river all hands have equity, and there are also usually future bets to consider, which makes things a lot more complicated. This is why, people, who want to be perfectly balanced against good opponents, spend a lot of time working with solvers or AI programs like PokerSnowie.

When facing a raise you calculate your own odds adding Villains call to the pot size, so in the case of the 3-bet the pot is 1,5BB + 2 x 3BB = 7,5BB.

Click to expand...

-Fundiver199

So you're saying 6 / (7.5 + 6 + 6) ^call / (pot + bet + call)^ would be the equation to find our required equity when facing a 3B after first betting?

When calculating for MDF, does consideration of later street action even matter? MDF is just to let you know what percentage of your hand to continue with when facing a bet so that you don't get exploited for over calling or over folding.

Its the math for required equity to call a bet thats complicated when it isn't the last bet because its not guaranteed that equity will be realized.

Thanks for your input. it just reminded me that RE math is mostly for river bets. (is this right?). Going on this idea, MDF is more important preflop and maybe RE math(or gap concept) is to give you a rough estimate to what hands to defend with.