Boolean operators ! & | xor rewritten as arithmetic ones (+ * - on numeric input 0/1) in JS

boolean2arithmetic.js

/*
 * Just for fun :) AND, OR and XOR with only "+ * - 2", plus "( ) 1" for NOT
 */

function not(a) {
  return (a-1)*(a-1);
  return a*(a-1)+(a+1)-2*a;
  return (a-2)*a+1;
  return and(a-1,a-1);
}

function and(a,b) {
  return a*b;
}

function or(a,b) {
  return a+b-a*b;
  return and(a,b)+xor(a,b);
}

function xor(a,b) {
  return a+b-2*a*b;
}