$M = 2-9\times 5 + 7 =$

$R = 29-6\times(-8) =$

$(-8,4) \div4 = $

$22-(-21) = $  

$H = \dfrac{-10}{6-1} =$

$B = 4\times(-3)- 10 \times (-2) =$

$(-5)\times(-41) = $

$B = (2-10)\times(4-9) =$

$-2-12 = $  

$50\times(-4) = $