Web pentesting, request form

I opened a page were i could submit a form to the website and put this command in the discription and url encoded the <>= twice. the form got acepted and now i dont know if the cmd worked… and i uploaded a xe file

John
Doe
… and it also got uploaded and acepoted and i dna if it worked… now i dont know how to go about it.

the (john doe) is like a usernamer and sirname typa x.x.e code i got from github… guess the protocol filtered some stuff.)

the (john doe) is like a usernamer and sirname typa XX3 code i got from github… guess the protocol filtered some stuff.) i hope u guys get it