👤

1+3+5+....+79
4+7+10+....+61
3+7+11+.....203
11+16+21+....+51
43+51+59+....+83


Răspuns :

1+3+5+10+40+79

4+7+10+10×2+61

3+7+11+199+203

11+16+21+26+51

43+51+59+64+83