Using PEMDAS, this is reduced to 50+50-0+2+2=50+50+2+2=104.
Multiplication takes priority over add and subtract, so multiplication must be carried first in the absence of any other grouping. 25×0=0 so this term does not affect any of the others, since adding or subtracting zero makes no difference. Addition can be carried out in any order, the result is always the same.