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$131)\\ (\frac{a}{a-b}-\frac{a}{a+b})*\frac{a+b}{a}\\ \frac{a+b}{a-b}-\frac{a+b}{a+b}\\ \frac{a+b}{a-b}-1\\ \frac{2b}{a-b}\\ 132)\\ (\frac{b}{a-b}-\frac{b}{a+b})*\frac{a-b}{b} \frac{a-b}{a-b}-\frac{a-b}{a+b}\\ 1-\frac{a-b}{a+b}\\ \frac{a+b-a+b}{a+b}\\ \frac{2b}{a+b}\\$

$133)\\ (\frac{a}{c}+\frac{c}{a}-2)*\frac{1}{a-c}\\ (\frac{a^2+c^2-2ac}{ac}*\frac{1}{a-c}\\ (\frac{(a-c)^2}{ac}*\frac{1}{a-c}\\ \frac{a-c}{ac}\\ 134)\\ (\frac{a}{b}+\frac{b}{a}+2)*\frac{1}{a+b}\\ \frac{(a+b)^2}{ab}*\frac{1}{a+b}\\ \frac{a+b}{ab}\\ 135)\\ \frac{(c+1)^2}{c-1}*\frac{1}{c+1}\\ \frac{c+1}{c-1}\\ 136)\\ (y+\frac{4y+1}{y-2})*\frac{1}{y+1}\\ \frac{(y+1)^2}{y-2}*\frac{1}{y+1}\\ \frac{y+1}{y-2}$