test_binomial = ->
	run_test [
		"binomial(12,6)",
		"924",

		"binomial(n,k)",
	#	"1/(factorial(k))*factorial(n)*1/(factorial(-k+n))",
	#	"factorial(n)/(factorial(k)*factorial(-k+n))",
		"n!/(k!*(-k+n)!)",

		"binomial(0,k)",
	#	"1/(factorial(k))*1/(factorial(-k))",
	#	"1/(factorial(k)*factorial(-k))",
		"1/(k!*(-k)!)",

		"binomial(n,0)",
		"1",

		"binomial(-1,k)",
		"0",

		"binomial(n,-1)",
		"0",
	]