{[(2809−2025):7+3⋅16]:[(441−56):7−51]2+2⋅25}2:(4+8+16+32)+10⋅4 = {[(784):7+48]:[(385):7−51]2+50}2:(60)+40 = {[112+48]:[55−51]2+50}2:60+40 = {[160]:[4]2+50}2:60+40 = {160:16+50}2:60+40 = {10+50}2:60+40 = {60}2:60+40 = 3600:60+40 = 60+40 = 100