Question

47502:[17 +23x3-(34:2+123:3)+10x5+9]-123

Answer 1

=47502:[17+69-(17+41)+50+9]-123
=47502:[17+69-58+50+9]-123
=47502:[86-58+50+9]-123
=47502:[28+50+9]-123
=47502:[78+9]-123
=47502:87-123
=546-123
=423