Question 1158353
<br>
The solution from the other tutor uses several multiplications to arrive at the (correct) answer.<br>
My preference is to use binomial expansion:<br><pre>
(1)(2^6) + (6)(2^5)(-i) + (15)(2^4)((-i)^2) + 20(2^3)((-i)^3) + 15(2^2)((-i)^4) + 6(2)((-i)^5) + (-i)^6
   64    +   (-192i)    +      (-240)       +     160i        +        60       +    (-12i)    +   (-1)

= -117 - 44i</pre>