(-7 + 3) - (2-6)
pretend that there is 1 in front of the first bracket
pretend that there is a -1 in front of the second bracket
1(-7+3)-1(2-6)
mutiply the first bracket by 1
(1)(-7)= -7
(1)(3)= 3
mutiply the second bracket by -1
(-1)(2)=-2
(-1)(-6)= 6
-7+3-2+6
-4+4
Answer: 0
