38
It is: 37+(-2)+(-65)+(-8) = -38
1 squared plus 8 squared or 4 squared plus 7 squared
65+2=67 65 +2 ------ 67
2/[3+1/{6+(1/6)}] = 2/[3+1/(37/6)] = 2/[3+6/37] = 2/3(1+2/37) = 2/3(39/37) =2*37/3*39 =74/117 =0.63247863247863247863247863247863
2 plus 2 equal 4
65
37
0.0541
10
1+2+3+... +65 = 65*66/2 = 65*33 = 2145 For the required sum, each term is simply double the corresponding term above, so 2+4+6+... + 130 = 2*2145 = 4290
2 42 37 598 134 26 47 969 81 84 80 75 98 17 57 48
72/7 + 65/7 = 14/1 or 14