Complex multiplication (a+bi)(c+di) = ac−bd + (ad+bc)i can be done with only three multiplications. Show how.

Analyze the complex multiplication (a+bi)(c+di) = ac−bd + (ad+bc)i can be done with only three multiplications. show how..

Examples
Input: "test_input_1"
Output: "output_1"
Hints

Complex multiplication (a+bi)(c+di) = ac−bd + (ad+bc)i can be done with only three multiplications. Show how.

Analyze the complex multiplication (a+bi)(c+di) = ac−bd + (ad+bc)i can be done with only three multiplications. show how..