first you multiply 10 and 4 because multiplication before addition and you get 40 then you add 40 and 2 to get 42 now you move to the second equation and you divide 6 and 8 because division comes before addition and you get 2 when you divide 6 and 3 now you add 9 and 2 and get 11 now you multiply 42 and 11 (because the parenthesis have nothing between them it means multiplication) and you get 462 as your answer