6. Which expression is equivalent to (7mn+2m-18nd)-(-3m-6mn+7nd) mn+5m-25nd 10mn-4m-11nd 10mn-m-25nd 13mn+5m-25nd

To find the expression equivalent to , we need to simplify the expression by combining like terms.Step 1: Remove the parentheses by distributing the negative sign to the terms inside the second set of parentheses. Step 2: Combine like terms. Therefore, the expression equivalent to is .