exam Maths Puzzle Numerical Ability

how do you solve this -5^2 compared to(-5)^2
if there are no parenthesis around the number and the negetive, does the negetive sign get squared?

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exam Other Question
the measure of the supplement of an angle is 30 degrees less than 5 times the measure of the compliment find 2/5 the measure of the compliment need help:
ADD:

3
+
2
____
x2

please write out left to right thats how its suppose to be written