Assuming you mean Beethoven's Symphony #5, Franz Liszt arranged it for piano solo. It is long out of copyright, and you should be able to turn it up at one of the sites that specializes in P.D. musical scores.
Pianos don't usually play in Symphony Orchestras. Occasionally, in some pieces they may play a specific piano part.
Mozart's Piano Concerto No. 5, Mvt. 1.
It's a short piece for solo piano, NOT a symphony.
Beethoven's Moonlight sonata is not a symphony. It's his 14th piano sonata.
A violin player/piano player
Violin and piano
get a piano teacher and learn
String Quintet (plus piano). I think you meant "like a symphony orchestra". A symphony is a piece of music, not a musical combo.
Beethoven, symphony
Brahms Symphony No 3
A "symphony" can have many definitions. It can be a musical piece or can signify a musical group. In the former, there are many pieces of music with the word 'symphony' included, not only for orchestra, but for other solo instruments such as the organ or piano. In that context, a 'symphony' could be played just about anywhere. In context of the latter, a symphony orchestra can also play almost anywhere be it a concert hall, a church, the home, outdoors ... anywhere.
None of Beethoven's symphonies has a piano part. He wrote five concertos for piano accompanied by orchestra, and a Fantasy for piano, chorus and orchestra.