$S = 4-6\times 4 + 12 =$

$(-3)\times(-7) = $

$-27-(-29) = $  

$M = 9\times(-8)- 5 \times (-2) =$

$F = 5+35\div(1-6) =$

$(-11)\times 11 = $

$\dfrac{81}{-9} = $

$C = 7+6\times(-8) =$

$-20-26 = $  

$K = \dfrac{-27+57}{6} =$