Evaluate
\left(9x+6y+4\right)^{2}
Expand
81x^{2}+108xy+72x+36y^{2}+48y+16
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81x^{2}+108xy+72x+36y^{2}+48y+16
Square 4+6y+9x.
81x^{2}+108xy+72x+36y^{2}+48y+16
Square 4+6y+9x.
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