Question

11/15+1/3-{2/5-5/6+[3/4-1/2-(7/30+4/5-1)+3/4]}-1=

Answer 1

-7/15  solo cuando es resta debes respetar los parentesis y corchetes

Answer 2

16/15-(-23/30+(1/2-1/30+3/4))-1
16/15-(-23/30+146/120)-1
16/15+23/30-146/120-1
55/30-146/120-1
74/120-1
-46/120