MyLogics

 37+14=50, 28+35=80, 89+41=?  1+4=5 => 5* 3=15+                  5*7=35                        =50 3+5=8=> 2*8=16                  8*8=64               +.        80 4+1=5=> 8*5=40                  9*5=45            +.           85 Therefore 85 is the answer

 1. If 302=23, 403=229 then 504=? solution: Here we should know the powers of each number: in the first thing the logic was 3x3-2x2=23 in the second thing the logic was 4x4x4x4 - 3x3x3=256-27=229 so, last one 5x5x5x5x5 - 4x4x4x4=3125-256=2869