Well the answer is 0 but if you want to learn the steps.Here you go.
First you would Apply the distributive property.Meaning you would need to multiply the negative to the positive 2 in the parentheses.Meaning the equation would be this.
m-[2(-2 - -m)] The two is now a negative because -1*2= -2.
Then you would simply m. There’s two negatives between -2 and -m because you’re gonna have to simply -m.You do not simply -2 because the negative is not in front of -2.Here is the equation gonna be.
m-[2(-2+m)]
Then you remove the parentheses because it is now not needed to finish the equation.Which would look like this
m-[2-2+m]
Then you subtract 2-2 which equals 0
m-[0+m]
You remove the brackets and now the equation is gonna look like
m-m
And your answer is 0.