I need help with #53 to #60 ASAP … please help this I don’t understand this …. I need to get it done before Monday … can someone please help me with it

Answer:
53. 256
54. 66
55. 117
56. 91
57. 285
58. 408
59. n(7n - 5) / 2
60. 325
Step-by-step explanation: