Probably I am an idiot but either I am missing something or the riddle is wrong. Can you provide either an answer, or a hint?

Math puzzle 58 currently only accepts 141 as answer. 582 should also be accepted. Math puzzle 112 currently only accepts 28 as answer. 0 is an alternative answer for the same rule. Side note: 113 is a duplicate of 51 75 is very similar to 36 It also seems that math riddle 193 has a mistake. It accepts 9 as answer, but that's not a number of the form x^2 + 1 as the others. If it's supposed to be x^2+1 of the opposite number, then the 17 is a typo and should be corrected to 7....

You might want to fix rebus 106 and 157. The Q in 106 should be an & and the image from 157 is the wrong way around. I also think there are some doubles in there, but I didn't write which ones :/