/=fractie
6)
a)= - 1/3
b)=-5
c)=8/7
d) 0,(4)=4/9; inversul=9/4
e)=1/x²
f)=1/24m
g) 2 intregi si 2/9 uv=20uv/9; inversul=9/20uv
h)=-1/100x²
i)=11/5y²z
7)
a=-1/3
b)=-5
c)=8/7
d)=-4x
e)=5
f)=3/5x7/6=7/10
g)=-8/9x3/4=-2/3
h)=6x/25x5/9=2x/15
i)=20a/9x27/10=6a
