Operator - Math game

Build operations with sequences of numbers in your mind to get a solution.

Instruction:
The operator of the interaction of sequences and the solution number are displayed on the top left.
It is necessary to obtain the solution number by sequentially combining the numbers into compound ones (for example, 1-2-3 => 123 or 321).
The sequence interaction operator applies to all selected numbers (for example, 10 + 10 => 20 or 11 or 2).