| $\LARGE \frac{a}{b} - 2\frac{a}{3b} $ | $\LARGE \frac{3a}{3b} - \frac{2a}{3b} = \frac{3a-2a}{3b} = \frac{a}{3b} $ |
| $\LARGE \frac{a}{x^2b} + \frac{a}{xb^3} $ | $\LARGE \frac{ab^2}{x^2b^3} + \frac{ax}{x^2b^3} = \frac{ab^2+ax}{x^2b^3}$ |
| $\LARGE \frac{a}{b} - \frac{b}{(a} =$ | $\LARGE \frac{a^2}{ab}$ - $\LARGE \frac{b^2}{ab}$ = $\LARGE \frac{a^2 - b^2}{ab}$ |
| $\LARGE \frac{2}{x^2 - x} + \frac{1}{x} =$ | $\LARGE \frac{2}{x(x - 1)}$ + $\LARGE \frac{x - 1}{x(x - 1)}$ = $\LARGE \frac{1 + x}{x(x - 1)}$ |
| $\LARGE \frac{a-b}{a^2+ab} - \frac{1}{(a+b)^2} =$ | $\LARGE \frac{}{}$ $\LARGE \frac{}{}$$\LARGE \frac{a^2-b^2 - a}{a(a+b)^2}$ |
