To simplify the expression, first simplify the terms inside the parentheses:
5 - 4 = 1
Then, continue simplifying the expression:
1/3 + 9/4 / 1−21 - 21−2 = 1/3 + 9/4 / -1= 1/3 + -9/4= 4/12 - 27/12= -23/12
Therefore, the answer is -23/12.
To simplify the expression, first simplify the terms inside the parentheses:
5 - 4 = 1
Then, continue simplifying the expression:
1/3 + 9/4 / 1−21 - 21−2 = 1/3 + 9/4 / -1
= 1/3 + -9/4
= 4/12 - 27/12
= -23/12
Therefore, the answer is -23/12.