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x^{4}-\frac{1}{2}\left(\left(x^{2}\right)^{2}-2x^{2}+1\right)+1-\frac{1}{2}\left(x^{2}+1\right)
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(x^{2}-1\right)^{2}.
x^{4}-\frac{1}{2}\left(x^{4}-2x^{2}+1\right)+1-\frac{1}{2}\left(x^{2}+1\right)
To raise a power to another power, multiply the exponents. Multiply 2 and 2 to get 4.
x^{4}-\frac{1}{2}x^{4}+x^{2}-\frac{1}{2}+1-\frac{1}{2}\left(x^{2}+1\right)
Use the distributive property to multiply -\frac{1}{2} by x^{4}-2x^{2}+1.
\frac{1}{2}x^{4}+x^{2}-\frac{1}{2}+1-\frac{1}{2}\left(x^{2}+1\right)
Combine x^{4} and -\frac{1}{2}x^{4} to get \frac{1}{2}x^{4}.
\frac{1}{2}x^{4}+x^{2}+\frac{1}{2}-\frac{1}{2}\left(x^{2}+1\right)
Add -\frac{1}{2} and 1 to get \frac{1}{2}.
\frac{1}{2}x^{4}+x^{2}+\frac{1}{2}-\frac{1}{2}x^{2}-\frac{1}{2}
Use the distributive property to multiply -\frac{1}{2} by x^{2}+1.
\frac{1}{2}x^{4}+\frac{1}{2}x^{2}+\frac{1}{2}-\frac{1}{2}
Combine x^{2} and -\frac{1}{2}x^{2} to get \frac{1}{2}x^{2}.
\frac{1}{2}x^{4}+\frac{1}{2}x^{2}
Subtract \frac{1}{2} from \frac{1}{2} to get 0.
x^{4}-\frac{1}{2}\left(\left(x^{2}\right)^{2}-2x^{2}+1\right)+1-\frac{1}{2}\left(x^{2}+1\right)
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(x^{2}-1\right)^{2}.
x^{4}-\frac{1}{2}\left(x^{4}-2x^{2}+1\right)+1-\frac{1}{2}\left(x^{2}+1\right)
To raise a power to another power, multiply the exponents. Multiply 2 and 2 to get 4.
x^{4}-\frac{1}{2}x^{4}+x^{2}-\frac{1}{2}+1-\frac{1}{2}\left(x^{2}+1\right)
Use the distributive property to multiply -\frac{1}{2} by x^{4}-2x^{2}+1.
\frac{1}{2}x^{4}+x^{2}-\frac{1}{2}+1-\frac{1}{2}\left(x^{2}+1\right)
Combine x^{4} and -\frac{1}{2}x^{4} to get \frac{1}{2}x^{4}.
\frac{1}{2}x^{4}+x^{2}+\frac{1}{2}-\frac{1}{2}\left(x^{2}+1\right)
Add -\frac{1}{2} and 1 to get \frac{1}{2}.
\frac{1}{2}x^{4}+x^{2}+\frac{1}{2}-\frac{1}{2}x^{2}-\frac{1}{2}
Use the distributive property to multiply -\frac{1}{2} by x^{2}+1.
\frac{1}{2}x^{4}+\frac{1}{2}x^{2}+\frac{1}{2}-\frac{1}{2}
Combine x^{2} and -\frac{1}{2}x^{2} to get \frac{1}{2}x^{2}.
\frac{1}{2}x^{4}+\frac{1}{2}x^{2}
Subtract \frac{1}{2} from \frac{1}{2} to get 0.