If you start at the Dead Sea, which has an elevation of -1,410 feet (1,410 feet below sea level), and you climb up 125 feet, you can calculate your new elevation as follows:
\[ -1,410 \text{ feet} + 125 \text{ feet} = -1,285 \text{ feet} \]
So, your new elevation would be -1,285 feet (1,285 feet below sea level).