Can you please help me with the second part

Consider the function f(x) = e I Note for the following questions: Do not use the factorial symbol (!). You may write the value of n!. For example, you may write 120 instead of 5!. () Write the first four terms of the Maclaurin series of e -I" Answer. 1-X^5+1/2"x^10+1/3*x^15 (") Write the first four terms of the series of / e dr