const plus_list = ['+', 6, 9, 10, 9, -1, -2, -3, -4];
const times_list = ['*', 6, 9, 9, 2];
const compound4 = ['+', plus_list , times_list, 7];
test("new +", (t) => assert.strictEqual(eval(plus_list),24));
test("new *", (t) => assert.strictEqual(eval(times_list),972));
test("compound4", (t) => assert.strictEqual(eval(compound4),1003));