1\frac{1}{2}+\frac{6}{11} \cdot 3\frac{1}{18}-2\frac{5}{8}:\frac{7}{12}= \frac{4}{7}+3\frac{3}{7}(\frac{7}{24}-\frac{5}{16})-\frac{4}{5}= -1+(\frac{29}{35}+\frac{4}{7}):3\frac{4}{15}-1\frac{1}{2}=