25+{2[3+8-7 (25/5) + 11]}

Let's solve it step by step:

(we start with the innermost bracket: (25/5). This is equal to 5.:

25+{2[3+8-7 (25/5) + 11]} =

25+{2[3+8-7 (5) + 11]} =

now, we can multiply 7 and 5, which is 35

25+{2[3+8-35+11]} =

Now we can add all the numbers in the square bracket, 3,8 (that's 11), then - 35 (which is - 24) then 11 - all together it's - 13

3+8-35+11=22-35=-13

25+{2[-13]} =

Multiplying 2 and - 13

25+{-26} = 25-26, which is - 1

the final answer is - 1