Adding and subtracting complex numbers

Simplify $\left(6+7i\right)-\left(10-2i\right)$  

•  $-4+9i$  

• .
  

Simplify:
(2 - 4i) + (5 + 6i)

• 7 + 2i
• 7 - 2i
• 7 + 2i²
• 7 - 2i²

What is the result of subtracting the complex numbers (5 + 2i) and (3 - 4i)?

• 2 + 6i

• 8 - 2i

• 7 - 8i

• 1 + 2i

• A
• B
• C
• D

Simplify.

(-10 + 4i) - (15 - 14i)

• -25+18i

• 25-18i

• 5-10i

• -5+10i

Simplify (2 + 3i) + (5 - 4i).

• 7 - i

• 10 - 2i

• 9 - 7i

• 3 + i