Find the Sum $\sum _ { k = 1 } ^ { 7 } \left( k ^ { 2 } - 4 \right)$

Multiple Choice

Find the sum: $\sum _ { k = 1 } ^ { 7 } \left( k ^ { 2 } - 4 \right)$

A) 0
B) 54
C) 45
D) 112