In advanced mathematics

heavy

Sign of definite integral

. Below the integer symbol is

definite integral

Scope, he has defined it all his life. The d at the back is

difference

Is the object to be integrated. His two d's are T-time and idea. That place is complete.

primary function

Wherever he is, write and do, which means to do, carry out and take action. If you have to explain the meaning of this formula, it is translated into vernacular: in life, for

every minute and every second

Take action on every idea.