Ответ:\(a^2-14a+49=(a-7)^2\);\(25y^2+10y+1=(5y+1)^2\);\(100a^2-180ab+81b^2=(10a-9b)^2\);\(16m^2+49n^2-56mn=(4m-7n)^2\);\(x^{10}-6x^5b+9b^2=(x^5-3b)^2\);\(36m^6+n^{12}+12m^3n^6=(6m^3+n^6)^2\).