[tex]h) \frac{x}{x + 1} + \frac{x}{ {x}^{2} + x } = \frac{x}{x + 1} + \frac{x}{x(x + 1)} = \frac{x}{x + 1} + \frac{1}{x + 1} = 1 [/tex]
[tex]i) \frac{1}{2a + 1} \times \frac{4a + 2}{3} = \frac{1}{2a + 1} \times \frac{2(2a + 1)}{3} = \frac{2(2a + 1)}{3(2a + 1)} = \frac{2}{3} [/tex]
