A= -1 + 2x3 + 4x5 -5
= -1+6+20-5
=20
B= 11 + 2 x [ ( -3 ) + ( -7) x3 ]
=11+2*(-3-21)
=11+2*(-24)
=11-48
=-37
C= (-7) + (-3) : (5-7)
= -7+ (-3):(-2)
= -7+ 3/2
= -14/2+3/2
= -11/2
D=[tex] \frac{-11*(-2)-(-3)*4}{2-2*(-6)} = \frac{22-(-12)}{2-(-12)} = \frac{22+12}{2+12} = \frac{34}{14} = \frac{17}{7} [/tex]