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\frac{\left(4x^{2}-10\right)\left(9y^{2}-x^{2}\right)}{\left(x-3y\right)\left(6x^{2}-15\right)}
Multiply \frac{4x^{2}-10}{x-3y} times \frac{9y^{2}-x^{2}}{6x^{2}-15} by multiplying numerator times numerator and denominator times denominator.
\frac{2\left(x+3y\right)\left(-x+3y\right)\left(2x^{2}-5\right)}{3\left(x-3y\right)\left(2x^{2}-5\right)}
Factor the expressions that are not already factored.
\frac{-2\left(x-3y\right)\left(x+3y\right)\left(2x^{2}-5\right)}{3\left(x-3y\right)\left(2x^{2}-5\right)}
Extract the negative sign in 3y-x.
\frac{-2\left(x+3y\right)}{3}
Cancel out \left(x-3y\right)\left(2x^{2}-5\right) in both numerator and denominator.
\frac{-2x-6y}{3}
Expand the expression.
\frac{\left(4x^{2}-10\right)\left(9y^{2}-x^{2}\right)}{\left(x-3y\right)\left(6x^{2}-15\right)}
Multiply \frac{4x^{2}-10}{x-3y} times \frac{9y^{2}-x^{2}}{6x^{2}-15} by multiplying numerator times numerator and denominator times denominator.
\frac{2\left(x+3y\right)\left(-x+3y\right)\left(2x^{2}-5\right)}{3\left(x-3y\right)\left(2x^{2}-5\right)}
Factor the expressions that are not already factored.
\frac{-2\left(x-3y\right)\left(x+3y\right)\left(2x^{2}-5\right)}{3\left(x-3y\right)\left(2x^{2}-5\right)}
Extract the negative sign in 3y-x.
\frac{-2\left(x+3y\right)}{3}
Cancel out \left(x-3y\right)\left(2x^{2}-5\right) in both numerator and denominator.
\frac{-2x-6y}{3}
Expand the expression.