计算: ( π − 3 . 14 ) 0 + ( 1 3 ) − 2 − | − 12 | + 4 cos 30 ° .
1.8×8.6+1.8×1.3+18%
100﹣98+96﹣94+92﹣90+…+76﹣74+72=
11+192+193+19994+199995=
=