Evaluate
\left(x^{2}+2x-1\right)^{2}
Expand
x^{4}+4x^{3}+2x^{2}-4x+1
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\left(x^{2}+2x-1\right)^{2}
Multiply x^{2}+2x-1 and x^{2}+2x-1 to get \left(x^{2}+2x-1\right)^{2}.
x^{4}+4x^{3}+2x^{2}-4x+1
Square x^{2}+2x-1.
\left(x^{2}+2x-1\right)^{2}
Multiply x^{2}+2x-1 and x^{2}+2x-1 to get \left(x^{2}+2x-1\right)^{2}.
x^{4}+4x^{3}+2x^{2}-4x+1
Square x^{2}+2x-1.
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