Well, MathUtilities.round() only takes one argument; MathUtilities.pow() requires two arguments . . .
I would suggest:
(1) Excel Formula: =ROUND((1+PMIF)^12-1,4);
IIRC the second argument to ROUND is the number of decimal palces
Code:
(float)MathUtilities.round( (MathUtilities.pow(1+PMIF,12)-1) * 10000 ) / 10000;
(2) Excel Formula: =((1+(AIR/2))^2)^(1/12)-1;
Code:
MathUtilities.pow(MathUtilities.pow( (1+(AIR/2)), 2), 1/12) - 1;
(3) Excel Formula: =(P*PIFM)/(1-(1+PIFM)^(-AMMO))..
Code:
(P*PIFM)/MathUtilities.pow(1-(1+PIFM), -AMMO);
(4) Excel Formula: =ROUND(PPM,2);
Code:
(float)MathUtilities.pow(PPM * 100) / 100;