Can someone tell me why this formule can't be saved? I'm losing my mind.

2. N=(x.executeXPath("/root/json/value/x/text()")).toLong();
3. E=(x.executeXPath("/root/json/value/y/text()")).toLong();
4. dX=(N  -  155000)  *  10.power(-5);
5. dY=(E  -  463000)  *  10.power(-5);

It says:

Error in saving the script:
Error at line number : -1 
Improper Statement
Error might be due to missing ';' at end of the line or incomplete expression