Applicare la formula: $\frac{a}{b}\frac{c}{f}$$=\frac{ac}{bf}$, dove $a=8x^2+10x+3$, $b=4x^2+4x+1$, $c=6x^2+x-1$, $a/b=\frac{8x^2+10x+3}{4x^2+4x+1}$, $f=9x^2+9x-4$, $c/f=\frac{6x^2+x-1}{9x^2+9x-4}$ e $a/bc/f=\frac{8x^2+10x+3}{4x^2+4x+1}\frac{6x^2+x-1}{9x^2+9x-4}$