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9x^{2}+6x+1+\left(2x-3\right)^{2}+\left(2-x\right)^{2}
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(3x+1\right)^{2}.
9x^{2}+6x+1+4x^{2}-12x+9+\left(2-x\right)^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(2x-3\right)^{2}.
13x^{2}+6x+1-12x+9+\left(2-x\right)^{2}
Combine 9x^{2} and 4x^{2} to get 13x^{2}.
13x^{2}-6x+1+9+\left(2-x\right)^{2}
Combine 6x and -12x to get -6x.
13x^{2}-6x+10+\left(2-x\right)^{2}
Add 1 and 9 to get 10.
13x^{2}-6x+10+4-4x+x^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(2-x\right)^{2}.
13x^{2}-6x+14-4x+x^{2}
Add 10 and 4 to get 14.
13x^{2}-10x+14+x^{2}
Combine -6x and -4x to get -10x.
14x^{2}-10x+14
Combine 13x^{2} and x^{2} to get 14x^{2}.
9x^{2}+6x+1+\left(2x-3\right)^{2}+\left(2-x\right)^{2}
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(3x+1\right)^{2}.
9x^{2}+6x+1+4x^{2}-12x+9+\left(2-x\right)^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(2x-3\right)^{2}.
13x^{2}+6x+1-12x+9+\left(2-x\right)^{2}
Combine 9x^{2} and 4x^{2} to get 13x^{2}.
13x^{2}-6x+1+9+\left(2-x\right)^{2}
Combine 6x and -12x to get -6x.
13x^{2}-6x+10+\left(2-x\right)^{2}
Add 1 and 9 to get 10.
13x^{2}-6x+10+4-4x+x^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(2-x\right)^{2}.
13x^{2}-6x+14-4x+x^{2}
Add 10 and 4 to get 14.
13x^{2}-10x+14+x^{2}
Combine -6x and -4x to get -10x.
14x^{2}-10x+14
Combine 13x^{2} and x^{2} to get 14x^{2}.