1.
A function y=f(x)y = f(x) satisfies (x+1)f(x)2(x2+x)f(x)=ex2x+1(x + 1) \cdot f'(x) - 2(x^2 + x) f(x) = \frac{e^{x^2}}{x + 1} for all x>1x > -1. If f(0)=5f(0) = 5, then f(x)f(x) is