\lim_{x \to 3} {{\sqrt{3x + 7} - \sqrt{2x + 10}} \over {\sqrt{4x + 13} - \sqrt{x + 22}}}{{\sqrt{3x + 7} + \sqrt{2x + 10}} \over {\sqrt{3x + 7} + \sqrt{2x + 10}}}{{\sqrt{4x + 13} + \sqrt{x + 22}} \over {\sqrt{4x + 13}+ \sqrt{x+22}}}