РЕШИТЕ ПОЖАЛУЙСТА!!!!!!!!!!!!!!!!!!!!ДАЮ 15 БАЛЛОВ!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!ВТОРОЙ ПРИМЕР!!!!!!!!!!

$=frac{3b^5-24b^4+144b^3-384b^2+768b}{b^3+64}= frac{3b(b^4-8b^3+48b^2-128b+256)}{b^3+64}$ $frac{y+6}{4y+8}- frac{y+2}{4y-8}+ frac{5}{y^2-4} = frac{16(y+6)(4y-8)-16(y+2)(4y-8)+5*16}{16y^2-64}$ $= frac{256y-432}{16y^2-64}=frac{16(16y-27)}{16(y^2-4)}$ $= frac{16y-27}{y^2-4}$

$frac{6b^3+48b}{b^3+64} - frac{3b^2}{b^2-4b+16} = frac{(6b^3+48b)(b^2-4b+16)-(3b^2)(b^3+64)}{(b+4)(b^2-4b+16)} =frac{3b^5-24b^4+144b^3-384b^2+768b}{b^3+64}=$ $frac{3b(b^4-8b^3+68b^2-128b+256)}{b^3+64}$