Evaluate $4\frac{3}{7}-7\frac{4}{7}$437−747, writing your answer as a mixed number in its simplified form.

Evaluate $4\frac{4}{7}-\left(-8\frac{2}{7}\right)$447−(−827), writing your answer as a mixed number in its simplest form.

Evaluate $-8\frac{4}{7}+3\frac{3}{7}$−847+337, writing your answer as a mixed number in its simplest form.

Evaluate $6\frac{3}{11}-9\frac{6}{11}$6311−9611, writing your answer as a mixed number in its simplest form.