JSFiddle - React, Tailwind, and code Playground

JavaScript

alert(((...arrays) => {
	let hash = new Map;
  
	arrays
		.reduce((hash, array) => {
			array.forEach(item => hash.set(item, !hash.has(item)));
			return hash;
		}, hash)
		.forEach((value, key, hash) => value || hash.delete(key));
    
	return hash.size;
})(
	[1,2,3,4,5,1],
	[90,7,2,4,0],
	[3,4,5,10]
))