XP Function

Formula
$$XP(x,y,z)=((-1*z+16)*y-3*z+38)*x+(-21*z+306)*y-43*z+708$$

z = time of clear stage

y = number of stage (Korea =1, Mongolia =2)

x = bonus EXP upgraded (bonus 1~10)

eg: For Arabia that is the stage N°14, with bonus = 10 and clear No 4, the XP is:

$$XP(10,14,4)=5584$$

Description
The equation is lineal and it depends of stage number, number of cleared, and the bonus XP, i'm start a table, in comparation with the real XP and the standard desviation of the real and aprox function is 5

this is part of the tables

Credit goes to Athesto.