Răspuns:
15+5×{20-5:[2-15:(18-15:5)]×4+15}+15=
15+5×{20-5:[2-15:(18-3)]×4+15}+15=
15+5×[20-5:(2-15:15)×4+15]+15=
15+5×[20-5:(2-1)×4+15]+15=
15+5×(20-5:1×4+15)+15=
15+5×(20-5×4+15)+15=
15+5×(20-20+15)+15=
15+5×(0+15)+15=
15+5×15+15=
15+75+15=
90+15=105
