x+y
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2(x+y) is twice the sum of x and y, and 2x+y is the sum of twice x and y
5(x^2 + y)
x - y = x + (-y)
To find 2 times the sum of x and y, you first need to calculate the sum of x and y by adding the two variables together. Once you have the sum, you multiply it by 2 to get the final result. In mathematical terms, the expression for 2 times the sum of x and y can be written as 2(x + y).
That depends on the value of x and y. As an expression, "x + y" can't be simplified.