9+30x+25x^2-9=25x^2+30x
25-(4m-5)=25-4m+5=30-4m
9p^2(4+3p)^2=9p^2(16+24p+9p^2)=144p^2+216p^3+81p^4=9p^2(16+24p+9p^2)
(-7k+1)^2+14k=49k^2-14k+1+14k=49k^2+1
9+30x+25x^2-9=25x^2+30x
25-(4m-5)=25-4m+5=30-4m
9p^2(4+3p)^2=9p^2(16+24p+9p^2)=144p^2+216p^3+81p^4=9p^2(16+24p+9p^2)
(-7k+1)^2+14k=49k^2-14k+1+14k=49k^2+1