9) \frac{3}{4}x²y - \frac{1}{2}xy² + 0,5xy² + \frac{2}{8}yx² =

\frac{3}{4}x²y - \frac{1}{2}xy² + 0,5xy² + \frac{2}{8}yx² = \frac{3}{4}x²y + \frac{2}{8}x²y - \frac{1}{2}xy² + 0,5xy² = \frac{6}{8}x²y + \frac{2}{8}x²y - \frac{1}{2}xy² + \frac{1}{2}xy² = \frac{8}{8}x²y + 0 = x²y