13. (2021秋•舒城县)已知p∈Rp\in Rp∈R,a>b>0a>b>0a>b>0比较下列各题中两个代数式值的大小:(1)(2p+1)(p−3)(2p+1)(p-3)(2p+1)(p−3)与(p−6)(p+3)+10(p-6)(p+3)+10(p−6)(p+3)+10;(2)a2−b2a2+b2\frac{{a^2}-{b^2}}{{a^2}+{b^2}}a2+b2a2−b2与a−ba+b\frac{a-b}{a+b}a+ba−b.