1) (а^2-0,4аb)^2=a^4+0,16a^2b^2-0,8a^3b ;
2) (0,8c^2d^3-10c^3d^2)^2=0,64c^4d^6+100c^6d^4-16c^5d^5
3) (2/3x^4y+5/4xy^4)^2= 4/25x^8y2+25/16x^2y^8+x^5y^5
4) 1/6m^6-3m^2n^3)^2=1/36m^12+9m^4n^6-m^8n^3;
5)(0,2a^6b^6-5/11ab)^2=0,04a104a^12b^12+25/121a^2b^2-2/11a^7b^7;
6)-не выходит