Выполните вычитание (5x-6)/(6x^2)-(4-9x)/(9x^3).

\[\frac{5x - 6^{\backslash 3x}}{6x^{2}} - \frac{4 - 9x^{2}}{9x^{3}} =\]

\[= \frac{3x(5x - 6) - 2 \cdot (4 - 9x)}{18x^{3}} =\]

\[= \frac{15x^{2} - 18x - 8 + 18x}{18x^{3}} = \frac{15x² - 8}{18x³}\]