1.(x+4)(x-5)+(3-x)=
2.10xy-5y+5(x-y)^2=
3.49-b^2=
4.x^3-1=
5.c^4-196=
6.m^3+n^3=
7.(x+y+c)(x-y+c)=
8.(a+1)^(a-1)^3=
9.(x-y)+b(x-y)^2+c(x-y)^3=(x-y)(.......)

^ - степень