}
func (c *Curve) add(p1x, p1y, p2x, p2y *big.Int) {
}
func (c *Curve) add(p1x, p1y, p2x, p2y *big.Int) {
}
func (c *Curve) Exp(degree, xS, yS *big.Int) (*big.Int, *big.Int, error) {
}
func (c *Curve) Exp(degree, xS, yS *big.Int) (*big.Int, *big.Int, error) {