a^2+4ab+4b^2=?
a^2+8a+16=?
16a^2+24ab+9b^2=?
9x^2+42xy+49y^2=?
9m^2-6mn+n^2=?
99^2=?
67^2=?
48^2=?
56^2=?
78^2=?
5^2+2*5*3+3^2=?
7^2-2*7*3+3^2=?
4^2+2*4*6+6=?
3^2-48+8^2=?
6^2+108+9^2=?
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