1.
Let f(x)=sin{x}x2+ax+bf(x) = \frac{\sin\{x\}}{x^2 + ax + b} where {}\{\cdot\} represents fractional part function. If f(5+)f(5^+) and f(3+)f(3^+) exist finitely and are non-zero, then the value of (a+b)(a+b) is