Indentify the center and radius: (x + 4)2 + (y + 5)2 = 64

please helppp!!

Simplify 5 square root of 7 end root plus 12 square root of 6 end root minus 10 square root of 7 end root minus 5 square root of 6 . (1 point) 5 square root of 14 end root minus 7 square root of 12 5 square root of 7 end root minus 7 square root of 6 7 square root of 12 end root minus 5 square root of 14 7 square root of 6 end root minus 5 square root of 7

Evaluate-27 ^4/3/8 a) - 81/16 b) 81/16 c) 16/81

Can someone me and plz do the problem