Ответ:
Объяснение:
1)((x+6)(x+6)-(x-6)(x-6))/(x-6)(x+6)=(x+6)^2-(x-6)^2/x^2-36=x^2+12x+36-x^2+12x-36/x^2-36=24x/x^2-36
2)3/(x-3)^2 : x/x-3= 3(x-3)/x(x-3)^2=3/x(x-3)=3/x^2-3x
3)((x+4)(x-4)+16/x-4)*x-4/x^2=(x^2-16+16/x-4)*(x-4/x^2)=x^2/x-4 * x-4/x^2=1
4)((x-5)(x-5)+(x+5)(x+5)/(x-5)(x+5)):x^2+25/x^2-25= 2x^2+50/x^2-25 :x^2+25/x^2-25= 2(x^2+25)/x^2-25 : x^2+25/x^2-25=2