[Help] Resources for finding in game calculation formulas

[meteorfal1]

Hello, I am trying to clone a web based game and I am stuck on finding the formula for resetting talents.

I tried to find some place to study and solve them but I don't know proper way to ask google for my help

Do you guys know any good resources to find them?

For example(If I didn't explained myself):
Player needs 500 gold for first talent reset, 7400 for second and 51500 for third.
What I am asking is some resources to find the formula to calculate them.

Like;

$talent_reset_cost = 500 * floor(pow($n, 2.8)); 

[MentaL]