Answer:
.
Step-by-step explanation:
The given phrase is "the square of y decreased by the quotient of 28 and 7".
We need to find the mathematical expression for the given phrase.
Power 2 is used for square.
The sign "/" is used for division or quotient.
The sign "-" is used for subtraction or decrease.
Using these sign we get
Square of y = 
Quotient of 28 and 7 = 
The square of y decreased by the quotient of 28 and 7 = 
Therefore, the required expression is
.