[yekanchi]

Compare these search results results:

https://www.google.com/search?q=2*2

https://www.google.com/search?q=-2*2

https://www.google.com/search?q=-3*3

https://www.google.com/search?q=6*3

[yekanchi]

with the above links there is no time lag, but if you try to test those search terms directly from you google page it will show the lag,

but even with the above links you can see that there is no search result for "-2 * 2" (without spaces)