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b)y+(-x)
c)xy+y*y+xy-3
*-znak mnożenia
b)x+x+x+y+y-3x+y-2y-x
c)xy+xy-2xy+3xy+y*y+9-2+5-8
Suma algebraiczna nie ma znaków mnożenia.
a) x+10+3x+11x-12x+x7-10-x
b) 14-5x+10x-6x+(-14+y)
c) 9xy-10xy+3xy-y²+(2y² - 3)