You are giving the expression:
11 + 7 - 25 + 5*5 + 9
Since there are no given parentheses, we go to the multiplication (no exponents):
11 + 7 - 25 + 25 + 9
25 and 25 cancel out:
11 + 7 + 9
Add:
11 + 7 + 9 = 20 + 7 = 27.
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