CTET 2 Math and Science 22 Dec 2021 Paper

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Question : 39 of 150
 
Marks: +1, -0
Let
p = 2x4 - x3y3 + 7y4
q = x4 + 3x3y3 - 5y4
and r = 3x4 - 4x3y3 + 2y4  
Then, p + q - r is equal to 
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