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\frac{1200D}{20B+19}
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\frac{1200D}{20B+19}
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\frac{4800\left(B-1\right)B^{2}D^{2}}{4D\left(B-1\right)\left(20B+19\right)B^{2}}
Factor the expressions that are not already factored.
\frac{1200D}{20B+19}
Cancel out 4D\left(B-1\right)B^{2} in both numerator and denominator.
\frac{4800\left(B-1\right)B^{2}D^{2}}{4D\left(B-1\right)\left(20B+19\right)B^{2}}
Factor the expressions that are not already factored.
\frac{1200D}{20B+19}
Cancel out 4D\left(B-1\right)B^{2} in both numerator and denominator.
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