Can you correct the following equations?

1. \((a+b)^2 = a^2 + b^2 \)
2. \(\frac{1}{a+b} = \frac{1}{a} + \frac{1}{b} \)
3. \(\frac{10^{10}}{2} = 10^5 \)
4. \(\frac{C}{D} + \frac{E}{F} = \frac{C+E}{D+F} \)
5. 4 divided by \(\frac{1}{2}\) gives 2.

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