def power_name(var, n, zeroth_power=''):
    if (n == 0):
        return zeroth_power
    elif (n == 1):
        return var
    else:
        return f'{var}^{{{n}}}'
def power_name(var, n, zeroth_power=):
    if (n == 0):
        return zeroth_power
    elif (n == 1):
        return var
    else:
        return f'{var}^{{{n}}}'