This is not a question but I think people commenting ''The answer to your question is in the file. Link below!'' are hackers or bots. Note: this is an assumption, and i think they are bots are hackers because they keep commenting on people's questions. So please be careful even though you don't believe me. I understand you don't believe me because I said it's an assuption.

-362

step-by-step explanation:

(12)(4)+2(12)-34(12)+2(12)-3

  \/         \/         \/         \/

  48 +   24 -   408 + 24 - 3

      \   /               \   /

          72     -     432 - 3 = -363

step-by-step explanation:

de-gf

hj=3x+20

ji=15x-64

1^3 + 2^3 + 3^3 +4^3 = (1+2+3+4)^2

step-by-step explanation:

i am only able to answer the first part. i am not sure about the second part. sorry