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Antwort 3.4:1

a)	\displaystyle x+1	b)	\displaystyle \displaystyle x-1+\frac{1}{x+1}	c)	\displaystyle x^2-ax+a^2
d)	\displaystyle x^2-x+2	e)	\displaystyle \displaystyle x-1+\frac{2x+2}{x^2+3x+1}