What is f(-1) ((02)(2.6)(13)(-13)(-418))?

Answer 1

An F horn, also known as a French horn or just a horn, is a brass wind instrument consisting of around 13 feet of metal tubing coiled up into a circular shape with a very large bell and 3 rotary valves, though some have a fourth key that acts as a bass key, which would make it a double horn. As the name suggests, it plays in the key of F, with it's concert Bb scale starting on F, and it's the only brass instrument played with the left hand. It can be played in both brass and woodwind groups, even though it is a brass instrument. It's arguably the hardest instrument to play in an orchestra.

I'm a horn player myself and I love the beautiful sound of this instrument! Hope this helps!