\[\frac{6p^{\backslash 12xy}}{5xy} + \frac{4k^{\backslash 20x}}{3xy^{2}} - \frac{3m^{\backslash 15y}}{4x^{2}y} = \ \]
\[= \frac{72pxy + 80kx - 45my}{60x²y²}\]