-x²
x³
2x+ y/2
-x². 5y
x².y²/2
x-(x+1)
x+(x-1)
3(x+y)
(x-y)²
x+y+z
(-x²)+ (-y²)
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Verified answer
-x²
x³
2x+ y/2
-x². 5y
x².y²/2
x-(x+1)
x+(x-1)
3(x+y)
(x-y)²
x+y+z
(-x²)+ (-y²)