You have to work from the inside out on the parentesis then brackets

I started off with the absolute value sign and the steps are as follows:

-[-(3)(-2-m)-4]=-2[-3-3m] Absolute value of -3 and subtract -2m

-[6+3m-4]=6+6m Distribute -3 through and distribute -2 through

-[2+3m]=6+6m Add like terms together

-2-3m=6+6m Distribute the negative through the equation

-8=9m Put like terms on each side of the equation

-8/9=m Divide -8 by 9 to get your result

Hope this helps you!!