a[2] = i2tor(3, 2)
		a[3] = i2tor(13, 6)
		a[4] = i2tor(73, 24)
		a[5] = i2tor(167, 40)
		a[6] = i2tor(4051, 720)
		a[7] = i2tor(37633, 5040)
		a[8] = i2tor(43817, 4480)
		a[9] = i2tor(4596553, 362880)
		checka(e, a, "Exp") // 1 1 3/2 13/6 73/24
		at := Integ(zero, MonSubst(Ones, neg(one), 2))
		for c, i := 1, 0; i < N; i++ {
			if i%2 == 0 {
				a[i] = zero
			} else {
				a[i] = i2tor(int64(c), int64(i))

		a[2] = i2tor(3, 2)
		a[3] = i2tor(13, 6)
		a[4] = i2tor(73, 24)
		a[5] = i2tor(167, 40)
		a[6] = i2tor(4051, 720)
		a[7] = i2tor(37633, 5040)
		a[8] = i2tor(43817, 4480)
		a[9] = i2tor(4596553, 362880)
		checka(e, a, "Exp") // 1 1 3/2 13/6 73/24
		at := Integ(zero, MonSubst(Ones, neg(one), 2))
		for c, i := 1, 0; i < N; i++ {
			if i%2 == 0 {
				a[i] = zero
			} else {
				a[i] = i2tor(int64(c), int64(i))

	if s != "hello" {
		panic("s")
	}

	m := map[string]float64{"one": 1.0, "two": 2.0, "pi": 22. / 7.}
	if len(m) != 3 {
		panic("m")
	}

	eq([]*R{itor(0), itor(1), itor(2), itor(3), itor(4), itor(5)})
	eq([]*R{{0}, {1}, {2}, {3}, {4}, {5}})

	p1 := NewP(1, 2)
	p2 := NewP(1, 2)
	if p1 == p2 {
		panic("NewP")
	}

	return "OOPS"
}

func (x complexVal) String() string { return fmt.Sprintf("(%s + %si)", x.re, x.im) }

func newFloat() *big.Float { return new(big.Float).SetPrec(prec) }

//go:noinline
//go:registerparams
func itor(x intVal) ratVal       { return ratVal{nil} }

//go:noinline
//go:registerparams
func itof(x intVal) floatVal     { return floatVal{nil} }
func rtof(x ratVal) floatVal     { return floatVal{newFloat().SetRat(x.val)} }

func i64tor(x int64Val) ratVal   { return ratVal{newRat().SetInt64(int64(x))} }
func i64tof(x int64Val) floatVal { return floatVal{newFloat().SetInt64(int64(x))} }
func itor(x intVal) ratVal       { return ratVal{newRat().SetInt(x.val)} }
func itof(x intVal) floatVal     { return floatVal{newFloat().SetInt(x.val)} }
func rtof(x ratVal) floatVal     { return floatVal{newFloat().SetRat(x.val)} }