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18 รท d

2dc

8 + 4x

3x โˆ’ 1

x2 โˆ’ 15

4c + 2d

4x โˆ’ 8

x2 + 15

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The total of eight and four times a number.

Fifteen less than a number squared.

One less than three times a number.

Four times the number of cats plus two times the number of dogs.

The quotient of 18 and d

The product of the number of dogs and cats times 2.