Evaluate
-\frac{4x\left(45x+37\right)}{81x^{4}+900x^{2}+625}
Expand
-\frac{4\left(45x^{2}+37x\right)}{81x^{4}+900x^{2}+625}
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\frac{-180x^{2}-148x}{81x^{4}+900x^{2}+625}
Combine -28x and -120x to get -148x.
\frac{-180x^{2}-148x}{81x^{4}+900x^{2}+625}
Combine -28x and -120x to get -148x.
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