Explicație pas cu pas:
a) 1+2×[1+6×(15-2):2+2]=
=1+2×(1+6×13:2+2)=
=1+2×(1+78:2+2)
=1+2×(1+39+2)
=1+2×(40+2)
=1+2×42
=1+84
=85
b) 5+3×{1+2×[4+4×(3+1)]-1}-5
=5+3×[1+2×(4+4×4)-1]-5
=5+3×[1+2×(4+16)-1]-5
=5+3×(1+2×20-1)-5
=5+3×(1+40-1)-5
=5+3×(41-1)-5
=5+3×42-5
=5+126-5
=131-5
=126
