\frac{7x + 7y}{ {x}^{2} + {y}^{2} } \frac{9x - 9y}{ {x}^{2} + {y}^{2} } " alt="2) \frac{7}{x - y} \frac{9}{x + y} = > \frac{7x + 7y}{ {x}^{2} + {y}^{2} } \frac{9x - 9y}{ {x}^{2} + {y}^{2} } " align="absmiddle" class="latex-formula">
\frac{7x + 35}{ {x}^{2} + 5x} \frac{4x}{ {x}^{2} + 5x} " alt="3) \frac{7}{x} \frac{4}{x + 5} = > \frac{7x + 35}{ {x}^{2} + 5x} \frac{4x}{ {x}^{2} + 5x} " align="absmiddle" class="latex-formula">
\frac{5}{ {a}^{2} - 25} \frac{6 {a}^{2} + 150a }{ {a}^{2} - 25 } " alt="4) \frac{5}{ {a}^{2} - 25} \frac{6a}{a - 5} = > \frac{5}{ {a}^{2} - 25} \frac{6 {a}^{2} + 150a }{ {a}^{2} - 25 } " align="absmiddle" class="latex-formula">