:square UNDUND中UNDsquare -|||-(2) dfrac (2a)({a)^2-9}=dfrac (1)(a-3)-|||-难度-|||-计算下列各题.-|||-(1) (x+1-dfrac (3)(x-1))+dfrac ({x)^2-4x+4}(x-1),-|||-(3) dfrac (4{a)^2-4a+1}({a)^2-1}+(2+dfrac (1)(a-1));-|||-(4) dfrac (a)({a)^2-25(b)^2}-dfrac (1)(2a-1)-|||-(5) dfrac (4)({x)^2-4}+dfrac (1)(x+2);-|||-(6) dfrac (x-1)(x+1)-dfrac ({x)^2+3}({x)^2-1}-|||-(7) dfrac (1)(x-1)+dfrac (1)(x+1)+dfrac (2x)({x)^2+1}+dfrac (4{x)^3}({x)^4+1};-|||-(8) dfrac (2a)({a)^2-16}-dfrac (1)(a-4)-|||-(9) https:/img.zuoyebang.cc/zyb_f31c5d3e586b59ff17bdfe84e5ae48af.jpg-dfrac (a-1)(a+2)+dfrac ({a)^2-1}({a)^2+4a+4} ;-|||-(10) dfrac (a)(a+2)-dfrac (-4)({a)^2+2a}