This question has been closed as a duplicate. The OP was asking "whether it is possible to do something without the use of specific packages" and the duplicate reference only have answer about loading packages.
I don't think it is the right way to mark this as a duplicate. Can't someone do that without the explicit use of these packages by replicating the behavior of one them? However, marking it as a duplicate says "no" implicitly. This is contradicting/misleading... and doesn't seem to answer the question... (a new user's first question...)
Wouldn't it be more appropriate to set a question like this to be a duplicate of sg about "copy-pasting code snippets from packages"? If there's anything like this... or is this the first?!