implify: \\( \\frac{\\left(x^{5}\ ight)^{-2}}{x y^{-3}} \\cdot \\frac{x^{4} y^{2}}{\\left(y^{-6}\ ight)^{3}} \\) \\[ \\begin{array}{l} \\frac{y^{23}}{x^{7}} \\\\ x^{7} y^{15} \\\\ \\frac{x^{7}}{y^{15}} \\\\ x^{7} y^{23} \\end{array} \\]