1003024603

SubArea: 
Combinatorics
Level: 
B
Project ID: 
1003024603
Accepted: 
1
Clonable: 
0
Easy: 
0
Simplify the following expression without using a calculator: \( \frac{85!+4\cdot84!-84\cdot83!}{2\cdot84!}\)
\( 44 \)
\( 88 \)
\( 66 \)
\( 22 \)