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Eight math problems
Answer? + 10a+25=(a+5)? =-|b-3|, that is to say, the formulas before and after are all 0, so we can know that a=-5 and b=3.

(a-b)? =(-5-3)? =64,b? =9,b? =27,a? +ab? -2a? b=- 125-45- 150=-320,ab+b? =- 15+9=-6,b? -a? =9-25=- 16, then the whole formula is equal to -5/8.