a) –12 + (-64) + (-17) + 4 =

b) 25 – 50 – 56 + 50 – 25 + 56 =

c) 3 ⋅ [-3 + (-3)] – 14 : (-7) =

d) 2 ⋅ [3 + (-2) ⋅ 5] + (-2)⋅(-5)⋅(-3) =

e) – 6 – 5 ⋅ [5 (-2) – 5] + (-5) ⋅ 4 =

f) –9 : 3 – [ (8 –10) – (9 - 2)] =

g) [(-4) 2 + 20 ] : (-4) + 2 (9 : (-3)) =

h) (-35) : (-5) – 3 ⋅ (5 – 7) =

i) [(-4) : (+2)] – [(+7) – (-2)] =

j) [(+3) - (+5) + (+4)] : [(+15) : (-3) – (-7)] =

k) -13⋅ (+3) - (-12) ⋅ (+7) =

l) [(-25) + 5 - (-2)] : (-8)=

m) –8 ⋅ [ 5 - (-2 )] – 48 : [6 + (-14)]=

n) –11 ⋅ [10 + (-7)] + 36 : [(-1) - (-10)] =

o) 42 : [(-6) – (-3)] + 28 : [-6 - (-8)]=