I'll guess the question was insert parens into
5 + 4 * 2 + 6 - (2*2) - 1 = 19
to make it true and the answer is indeed the answer shown:
(5 + 4) * 2 + 6 - (2*2) - 1 = 9*2 + 6-4-1 = 18+6-4-1=19, check
