Final answer:
When adding complex numbers, we add the real parts and the imaginary parts separately.
Step-by-step explanation:
In the expression (12-5i)+(10+6i), we add the real parts and the imaginary parts separately.
The real parts are 12 and 10, so 12+10=22.
The imaginary parts are -5i and 6i, so -5i+6i=i.
Therefore, the correct result is 22+i.