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The expression 4(4+5) simplifies to 4(9), which equals 36.
The expression 2(8+10) simplifies to 2(18), which equals 36.
The expression 4(4x5) simplifies to 4(20), which equals 80.
So, the equalities are as follows:
4(4+5) = 2(8+10) = 36
4(4x5) = 80
Therefore, the answer is 36.