Simple calculation 17 * (2 / 19-1 / 17) * 19 Simple calculation 17 * (2 / 19-1 / 17) * 19

Simple calculation 17 * (2 / 19-1 / 17) * 19 Simple calculation 17 * (2 / 19-1 / 17) * 19

simple form
=17×(2/19×19)-(17×1/17)×19
=17×2-19
=34-19
=15