Question Number 77280 by A8;15: last updated on 05/Jan/20
Commented by mr W last updated on 05/Jan/20
$$?????? \\ $$$${can}\:{you}\:{understand}\:{yourself}\:{sir}? \\ $$
Commented by mathmax by abdo last updated on 05/Jan/20
$${the}\:{Q}\:{here}\:{is}\:{prove}\:{that}\:{paper}\:{contain}\:{something}... \\ $$