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A = (-2) x (-5) - (-5)^2

A = 10 - 25

A = -15

B = -30 : (-4 + 6) + (-5,5)

B = -30 : 2 - 5,5

B = -15 - 5,5

B = -20,5

C = -5/8 + 5/12

C = (-5 x 3)/(8 x 3) + (5 x 2)/(12 x 2)

C = -15/24 + 10/24

C = -5/24

D = -14/25 : (-7/15)

D = -14/25 x 15/7

D = (-14 x 15)/(25 x 7)

D = -14/7 x 15/25

D = (-2 x 7)/7 x (5 x 3)/( 5 x 5)

D = -2 x 3/5

D = -6/5