51+3=54,43+6=49,32+60=92,79+10=89,38+50=88,52+3=55,74+20=94,13+2=15,61+30=91,55-4=51,36-6=30,81-30=51,58-30=28,49-5=44,77-40=37,52-40=12,99-50=49,48-6=42
51+3=54,43+6=49,32+60=92,79+10=89,38+50=88,52+3=55,74+20=94,13+2=15,61+30=91,55-4=51,36-6=30,81-30=51,58-30=28,49-5=44,77-40=37,52-40=12,99-50=49,48-6=42