Can someone teach me properties of exponents pre algebra

What is the standard form of -5x^2+2x^4-11+x^3+3x

Monica build a remote control toy airplane for science project to test the plane she launched it from the top of a building the plane travel a horizontal distance of 50 feet before landing on the ground a quadratic function which models the height of the plane in feet relative to the ground at a horizontal distance of x feet from the building is shown

I’m really confused and need to learn this