(n-3)(n-10)=? (5a^2-2x^3)(2x^3+5a^2)=? 25-x^2=? 1-6c^2+9c^4=? m^4+2m ^2n^3+n6=? 1+y^2-2y=? 28xy+49x^2+4y^2=? 4x^2+12x+9=? 16-49y^2=? 4x^2-1=? 8+a^3=? a^2-6ab+9b^2=? 9z^2-25=? y^6+2y^3+1=? a (3a^2+a)=?
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