a) [ - 3 la puterea 2 + ( - 3) la puterea 2 - ( - 3) + (-2) × (5-7)
= (-3)×(-3) + (-3) × (-3) - (-3) + ( - 2) × ( 5-7)
= 9 + 9 - 5 × ( - 2)
= 18 + 10 = 28
b) [( - 2) × ( - 2) la puterea 3 + 5] : 2 - (4-8)} × ( - 2) + [ 6 - ( - 2) la puterea 3
= [(-2) × ( - 2)× (-2)×(-2) + 5] : 12 × (-2) + [ 6 - ( - 2)
= [(-2) × ( - 8) +5] : 12 × ( - 2) + [ 6 - (-2)
= (16 +5) : 12 × ( - 2) + [ 6- ( - 2)
= 21 : 12 × (-2) + 8
= 4,5