There is a certain order that we follow in doing any mathematical operation: First we get rid of any operation within brackets, then we do multiplication and divisions and finally we do additions and subtractions.
We need to evaluate: 5x2x(-4) + 6: So since we have no operations within brackets, then we will do the multiplications first (in their order) then the addition: 5x2x(-4)+6 = 10x(-4)+6 = -40+6 = -34