101 is the answer
3 rock wings =60 therefore 1 rockwing = 60/3 =20
1 rockwing plus 2 nest of eggs =30 therefore 1nest of eggs = ( 30-20 )/2 =5
1 nest of eggs minus 2 bears = 3 therefore 1 bear = ( 5-3 )/2 = 1
hence 1 bear + 1 rockwing multiply by 1 nest of eggs = 20x5+1 = 101