The answer is 559. Simply add the numbers together arithmetically as you would for the problem two plus two. To check your work, a calculator is the best option.
354
59+59+59=177
59 + 59 + 589 + 96 + 89878 + 74848 = 165529
500 - 441 = 59
59
if it is 59+59+58/3 then ans is 137.33 if it is (59+59+58)/3 then ans is 58.666
59 + 64 + 93 = 216
59 IT IS 59
59 + 3 = 62
59 + 5475465 = 5475524
50 + 59 = 109
59 + 56 = 115