test_adj = ->
	run_test [

		"adj(((a,b),(c,d)))",
		"((d,-b),(-c,a))",

		"adj(((1,2),(3,4)))",
		"((4,-2),(-3,1))",

		"adj(((2,3,-2,5),(6,-2,1,4),(5,10,3,-2),(-1,2,2,3)))",
		"((-4,-177,-73,194),(-117,117,-99,-27),(310,-129,-44,-374),(-130,-51,71,-211))",
	]