Răspuns:
9×{8+7×[6+5×(4+3×(2+1))]}÷(1+2+3+...+9)=
9×{8+7×[6+5×(4+9)]÷[9×(9+1)]÷2=
9×[8+7×(6+5×13)÷(9×10)÷2=
9×[8+7×(6+65)÷90÷2=
9×(8+7×71)÷45=
9×505÷45=
4545÷45=
101