Zredukuj wyrazy podobne.
a) -4x-7-3x+7
b) x-2xy+½x-⅓xy
c) -x²+y²-2x²-2y²
d) -x²+2x-3x+x²
e) 4x+4-7x-½
f) -2ab+12a-4ab-16a
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a)-7x
b)1,5x^2-2,5xy
c)-3x^2-y^2
d)-x
e)-3x-3,5
f)-6ab-4a