Find the sum of the vectors `veca = -2hati+hatj-4hatk` and `vecb = 3hati-hatj+5hatk`.

Explanation

To find the sum of the vectors \(\vec{a} = -2\hat{i} + \hat{j} - 4\hat{k}\) and \(\vec{b} = 3\hat{i} - \hat{j} + 5\hat{k}\), we will follow these steps:

### Step 1: Write down the vectors
We have:
\[ \vec{a} = -2\hat{i} + \hat{j} - 4\hat{k} \]
\[
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