fn sub(a: &Self::BaseType, b: &Self::BaseType) -> Self::BaseType {
        [a[0] - b[0], a[1] - b[1], a[2] - b[2], a[3] - b[3]]
    }
Subtraction of degree four field extension elements
crates/math/src/field/fields/fft_friendly/quartic_babybear_u32.rs