pub const POLY_BODY: &str = "(((2 * x + 5) * x - 3) * x + 100)";
The demonstration residual: a degree-3 polynomial in Horner form, 2x³ + 5x² − 3x + 100. Straight-line (+ - *), so the compiler residualizes it dispatch-free.
2x³ + 5x² − 3x + 100
+ - *