Evaluate
\left(3s^{4}+5s^{2}-s-4\right)^{2}
Expand
9s^{8}+30s^{6}-6s^{5}+s^{4}-10s^{3}-39s^{2}+8s+16
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9s^{8}+30s^{6}-6s^{5}+s^{4}-10s^{3}-39s^{2}+8s+16
Square 3s^{4}+5s^{2}-s-4.
9s^{8}+30s^{6}-6s^{5}+s^{4}-10s^{3}-39s^{2}+8s+16
Square 3s^{4}+5s^{2}-s-4.
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