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[100-3 x (13 x 9-12 x 18)] x {1+2 x[3+4 x (5+6 x 7)]}

Răspuns :

[100-3 x (13 x 9-12 x 18)] x {1+2 x[3+4 x (5+6 x 7)]}=

=
[100-3 x (117-216)] x {1+2 x[3+4 x (5+42)]}=

=(100-3 x  -99) x [1+2 x(3+4 x 47)]=(100+297) x [1+2 x(3+188)]=

= 397 x (1+2 x201)=397*(1+402)= 397*403=159 991