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Identify the operations (addition, subtraction, division, multiplication) in forming the following expressions and tell how the expressions have been formed. (a) `z + 1, z - 1, y + 17 , y -17` (b) `17 y, (y)/(17) , 5 z` (c) `7 m, - 7 m + 3, - 7 m - 3 `

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1)addition,subtraction,addition,subtraction
2)multiplication,division,multiplication
3)multiplication and additon, multiplication and sabtraction.
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