Răspuns :
9+8x[7+6x(5+4x3)-2x1]-10x10=
9+8x[7+6x(5+12)-2x1]-10x10=
9+8x(6x17-2x1)-10x10=
9+8x(102-2)-10x10=
9+8x100-100=
9+800-100=
809-100=
709
9+8×[7+6×(5+4×3)-2×1]-10×10
=9+8×[7+6×(5+12)-2]-100
=9+8×(7+6×17-2)-100
=9+8×(7+102-2)-100
=9+8×107-100
=9+856-100
=865-100
=765