41.1. Выполните действия (41.1-41.2): 1)(2a/y^2-2/a)÷(1/y+1/a);
2)(n/m^2+n^2/m^3)÷(m^2/3n^2+m/3n);
3)ab+b^2/5÷b^3/5a+a+b/b;
4)x-y/x-5y/x^2×x^2-xy/5y;
5)(x/x+1+1)×1+x/2x-1;
6)(4a/2-a-a)÷a+2/a-2;
7)5y^2/1-y^2÷(1-1/1-y);
8)xb+b^2/7÷b^2/7x+x+b/b;
9)x-4/x-5×(x+x/4-x);
10)(a-b/2a+2b)÷(2/a-2/b)×(4a+4b/a^2b).
41.2.
1)(2m+1/2m-1-2m-1/2m+1)÷4m/10m-5;
2)(y+3/y^2+9)×(y+3/y-3+y-3/y+3).
