20-2=63-3=27x5=510-3=40x9=23x30=84-4=15-3=12x4=513x9=4x815=99-9=75-5=205-5=46x10=24x20=40-2=60x6=900-9=130x4=810-3=72-24=16x4=16x5=63-3=50x6=100x5=23x40=45x30=60-2=67+23=480-8=26x20=0x51=0-47=57-7=505-5=21-5=92-45=270+30=460+200=600-3=6x7+6=36-3-2=5x5+4=50-24-4=9+9-9=800-800-4=8x9-7=72-72-6=8+2x10=90-30-3=6x80-20=12x3-3=5x8-8=57x3x0=86-86-2=38x2x7=24+15+6=18-3-4=50x6+0=45+55-5=70x(40-32)二0-3000=504-2=43x21^38x48-347-7~817-8-37x28-18x54^431-6-381-2~75+21=69-57=49+37=81-25=40-8=25x3=268+125=280+40=66-22=46x20=85-42=28+2 二14x6=700-300 二51-3=21-7=18+16=810-9=8x7+6=300-2—5=960-4=5+3=1x10000=90-31=60x9=55+41=30x4=600x8=78-28=80+120=5x60=15x2=12x8=36-12=120-20=16-2=50-25=20+180=200x4=39-3=20-14=16x5=30x80=800-8=265+85=110x35=901-3=0-245=0x245=0+245=245-5=3000-300=605-5=50x50=306-3=702-199=480-3=9