Even works with ZEROES 9x0 - 0x9 = 891 + 198 - 1089. Read this in a book by Shalinka Devi in my teens. She also has a great about about 1729 to blow the qubic theory. 1729 is the lowest number that is the sum of two cubes in TWO different ways. 10^3 + 9^3 = 12^3 + 1^3. Reply
9x0 - 0x9 = 891 + 198 - 1089.
Read this in a book by Shalinka Devi in my teens.
She also has a great about about 1729 to blow the qubic theory. 1729 is the lowest number that is the sum of two cubes in TWO different ways.
10^3 + 9^3 = 12^3 + 1^3.