let f(a, b) {
	if (a == 0) then
		2 + b
	else
		let g(a, c) {
			a + c + b
		} in 2 + g(a, b)
} g(c, d) {
	if (c == 0) then
		1 + d
	else
		c * f(c - 1, d)
} in f (2, 3); g (3, 2)