Can anyone help me with this extra credit problem?

e^x= 1 +(x/1) + (x^2/2) + (x^3/6) = (x^4/24)...X^n/n!

I have to read in x from the keyboard and use the exponential function on x and write the result.

Then do the approximation for the first four terms, starting at 1 and write the results.

Then write the difference between the two.