Evaluate `(5-7i) +(2+4i).`

Explanation

To evaluate the sum of the complex numbers \( (5 - 7i) + (2 + 4i) \), we can follow these steps:

### Step 1: Identify the real and imaginary parts
The given complex numbers are:
- \( z_1 = 5 - 7i \)
- \( z_2 = 2 + 4i \)

### Step 2: Group the real parts together
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