Factor
\frac{20x^{2}y^{3}+8y^{3}x^{4}+10y^{2}x^{3}-5}{20}
Evaluate
\frac{y^{2}x^{3}}{2}+\frac{2y^{3}x^{4}}{5}+x^{2}y^{3}-\frac{1}{4}
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\frac{10x^{3}y^{2}+20x^{2}y^{3}+8x^{4}y^{3}-5}{20}
Factor out \frac{1}{20}.
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