Factor
\frac{ax\left(-16ax^{3}-100x^{2}a^{3}-25b^{2}\right)}{40}
Evaluate
-\frac{5x^{3}a^{4}}{2}-\frac{2a^{2}x^{4}}{5}-\frac{5axb^{2}}{8}
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\frac{-100a^{2}xx^{2}a^{2}-16a^{2}x^{4}-25ab^{2}x}{40}
Factor out \frac{1}{40}.
ax\left(-100a^{3}x^{2}-16ax^{3}-25b^{2}\right)
Consider -100a^{4}x^{3}-16a^{2}x^{4}-25ab^{2}x. Factor out ax.
\frac{ax\left(-100a^{3}x^{2}-16ax^{3}-25b^{2}\right)}{40}
Rewrite the complete factored expression.
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