[4^2 + 19] = [1619] = 3
[7^2 + 5(10)] = [49 + 50] 99
[3]  [99] = 96. IF the equation had read [ [4^2 + 19]  [7^2 + 5(10)]], then the whole equation would be absolute value (positive 96), but since the subtraction is NOT part of the absolute value, the simplied version is 3  99 = 96 It depends if the subtration is IN absolute value or OUTSIDE of it. In this case, the subtraction is not part of the equation, so the answer is a negative number.
9/2/2013

Beth L.