let a = Tensor(shape: [2, 3], elements: [1, 2, 3, 4, 5, 6]) let b = Tensor(shape: [2, 3], elements: [7, 8, 9, 10, 11, 12]) let sum = a + b // Tensor(shape: [2, 3], elements: [8, 10, 12, 14, 16, 18]) let mul = a * b // Tensor(shape: [2, 3], elements: [7, 16, 27, 40, 55, 72]) let c = Tensor(shape: [3, 1], elements: [7, 8, 9]) let matmul = a.matmul(c) // Tensor(shape: [2, 1], elements: [50, 122]) let

