Simplify the following expression.

w26w+5w2+5w6w2+12w+36w225÷w24w60w217w+70\displaystyle \frac{{{w}^{{2}}-{6}{w}+{5}}}{{{w}^{{2}}+{5}{w}-{6}}}\cdot\frac{{{w}^{{2}}+{12}{w}+{36}}}{{{w}^{{2}}-{25}}}\div\frac{{{w}^{{2}}-{4}{w}-{60}}}{{{w}^{{2}}-{17}{w}+{70}}}