'OverflowError: (34, 'Result too large') when performing operation on simple numbers

I am trying to use the tanH function in my code but I can't perform it on simple numbers ex. 74.83 because it always says "OverflorError: (34, 'Result too large')". There is not much code that is relevant to the problem, here it is

nv += (p_n * w)
nv = round(nv, 2)
            if n == len(in)-1:
                nv = tanh_activate(nv) #error in this function
            else:
                nv = relu_activate(nv)

and

def tanh_activate(x):
    er = round(e,4) #e from cmath library
    return round(pow(er,x)-pow(round(er,-x)) / (pow(er,x)+pow(er,-x)),2)

how do I make the function avoid returning a float that is larger than the float limit?

python floating-point

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'OverflowError: (34, 'Result too large') when performing operation on simple numbers

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