Add or subtract as indicated. Simplify by writing in the form $\displaystyle {a}+{b}{i}$ 

Add: $\displaystyle {\left({22}-{11}{i}\right)}+{\left({7}+{6}{i}\right)}$  = Preview Question 6 Part 1 of 2  

Subtract: $\displaystyle {\left({22}-{11}{i}\right)}-{\left({7}+{6}{i}\right)}$  = Preview Question 6 Part 2 of 2