d) (100 – 3* (13*19-12-18)] {1+2*[3+4*(5 +6*7)};​

(100-3*[(13*19*12-18)]*{1+2*[3+4*(5+6*7)}=

=(100-3*[(247*12-18)]*{1+2*[3+4*(5+6*7)]}

=100-3*(2964-18)*{1+2*[3+4*(5+42)]}

=100-3*2946*[1+2*(3+4*47)]

=100-3*2946*[1+2*(3+188)]

=100-3*2946*(1+2+191)

=100-3*2946*(3+191)

=100-3*2946*194

=100-8838*194

=100- 1714572

= - 1714472

Explicație pas cu pas:

1) [97*(247-12-18)]

[97*(235-18)]

(97*217)=21049

2){1+2*[3+4*(11+6)]}

[1+2*(3+4*18)

[1+2*(3+72)

(1+2*75)

(1+150)=151

sper cai bn. si scz că nu am acră exerciţiul gen am scri cum se face