14 (–1 1/7 + 2 1/14 – 3 1/2)
[m]14\cdot (-\frac{8}{7}+\frac{29}{14}-\frac{7}{2})=14\cdot (-\frac{8}{7})+14\cdot \frac{29}{14}+14\cdot (-\frac{7}{2})=-16+29-49=-36[/m]