We currently do not support the use of negative exponents by using carets (^). You’ll need to use the math object: Math.pow(x,y). x will be your base value and y will be your power value, just like x to the power of y.

So for your case, the formula should be the following:
(A23*((A24/100)/12))/(1-(Math.pow((1+(A24/100)/12),((-1)*A25))))

For your exponential part that you’ll be using the math object:
x=(1+(A24/100)/12)
y=(-1)*A25)

If you have any questions, feel free to let us know.