i need help with 57,59, and 61 thanks

57. lim SS. lim [1/(x + 4)] x 2(x + Ax) 59. lim Ax-40 Ax (x + Ax)2 60. lim Ax (x + Ax)2 61. lim (1/3) (1/4) 2x 2 Ax (x + Ax)3 x3 62. lim Ax