Returns the result of addition of two or more complex numbers.

**Sample Usage**

IMSUM("1+2i","3+4i")

IMSUM(C5, C6)

**Syntax**

IMSUM(complex_number1, [complex_number2,..])

- complex_number1 - The first complex number to add.
- complex_number2 - [OPTIONAL] Additional complex numbers to calculate for the sum.

**Examples**

IMSUM("1+2i","3+4i") returns a value of "4+6i".

IMSUM(C5,C6) returns the sum of the complex numbers contained in the two cells: C5 and C6.

**Notes**

- The sum of two complex numbers is:
- (a+bi) + (c+di) = (a+c) + (b+d)i

- You can sum complex numbers only if they have the same suffix (i or j).