Find the Indicated Sum or Difference $$6 m - 14 m + 3 m$$

Find the indicated sum or difference. $$6 m - 14 m + 3 m$$

A) $- 5 m ^ { 3 }$
B) $5 m$
C) $- 5 m$
D) $- 2 m$
E) $2 m$