For most parents, parenting is hard. But for KAY (Maggie Lawson, “Lethal Weapon,” “Psych”), a caustic, take-no-prisoners casino pit boss, and husband MIKE (Jason Biggs, “Orange Is the New Black,” the “American Pie” franchise), a handyman and uncultivated guy’s guy, parenting may as well be advanced calculus. Dealing with the demands and egos of three high-IQ children would be tricky for any parent, but it’s especially hazardous for two working stiffs who barely got through high school. Mike and Kay are committed to bringing some normalcy to their kids’ hectic, unconventional childhoods, but these geniuses don’t make it easy.