[tex] \frac{a {}^{2} + ab }{ab } [/tex]
[tex] \frac{3b {}^{2} + 2b }{b {}^{2} - 4 } - \frac{b}{b - 2} [/tex]
[tex] \frac{2 + 5c {}^{2} }{c -} - 6c[/tex]
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Answers & Comments
a²+ab/ab=a(a+b)/ab=a+b/b
3b²+2b/b²-4 -b/b-2=3b²+2b-b(b+2)/b²-4=3b²+2b-b²-2b/b²-4=2b²/b²-4
2+5c²/c -6c=c(2/c+5c)/c -6c=2/c+5c-6c=2/c-c