It can be interpreted either of two ways.
1) "It's like a mathematics class."
2) "Which mathematics class is it?"
es una clase de matematicas means is a kind of mathematics
what does A que hora es tu clase de matematicas
¿A qué hora tienes la clase de matemáticas? means What time is your Math class?
Math class is very difficult.
no. It's tengo la clase de matematicas. Las is plural, but clase is singular. there needs to be agreement. if you have more than one class, you would say yo tengo las clases... or if you have more than one math class, "yo tengo (number) clases de matematicas."
Are you guys in math class?
This means, "What do you need for the math class?"
It means, "I need a calculator and a ring binder for the mathematics class."
yo tengo una clase de matematicas y ciencias
Tengo la clase de matematicas en la primera hora.
El salon de clase means classroom.
"No you gusto clase de espanol" does not mean anything meaningful in Spanish. You may mean, "No me gusta clase de español," which translates to "I don't like Spanish class."