4. Раскройте скобки и упростите выражение: 9 - (5 + 2/3 + 1/4)

Convert mixed number to fraction: 9 - (5 + 2/3 + 1/4)
Find a common denominator for the fractions inside the parenthesis (12): 9 - (5 + 8/12 + 3/12)
= 9 - (5 + 11/12) = 9 - 5 - 11/12 = 4 - 11/12 = 3 + 1/12 = 37/12