1)[tex] \frac{c+d}{c ^{2} -b ^{2} } + \frac{c-d}{b ^{2}-c ^{2} } [/tex]
2)[tex] \frac{x+1}{a-b} - \frac{x+2}{b-a} - \frac{x-1}{a-b} [/tex]
даю 50баллов