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\frac{\left(a-3\right)\left(a+2\right)}{\left(a-2\right)\left(a+2\right)}-2-\frac{a-1}{2-a}
Me whakatauwehe ngā kīanga kāore anō i whakatauwehea i roto o \frac{a^{2}-a-6}{a^{2}-4}.
\frac{a-3}{a-2}-2-\frac{a-1}{2-a}
Me whakakore tahi te a+2 i te taurunga me te tauraro.
\frac{a-3}{a-2}-\frac{2\left(a-2\right)}{a-2}-\frac{a-1}{2-a}
Hei tāpiri, hei tango kīanga rānei, me whakaroha ērā kia rite ā rātou tauraro. Whakareatia 2 ki te \frac{a-2}{a-2}.
\frac{a-3-2\left(a-2\right)}{a-2}-\frac{a-1}{2-a}
Tā te mea he rite te tauraro o \frac{a-3}{a-2} me \frac{2\left(a-2\right)}{a-2}, me tango rāua mā te tango i ō raua taurunga.
\frac{a-3-2a+4}{a-2}-\frac{a-1}{2-a}
Mahia ngā whakarea i roto o a-3-2\left(a-2\right).
\frac{-a+1}{a-2}-\frac{a-1}{2-a}
Whakakotahitia ngā kupu rite i a-3-2a+4.
\frac{-a+1}{a-2}-\frac{-\left(a-1\right)}{a-2}
Hei tāpiri, hei tango kīanga rānei, me whakaroha ērā kia rite ā rātou tauraro. Ko te taurea pātahi iti rawa o a-2 me 2-a ko a-2. Whakareatia \frac{a-1}{2-a} ki te \frac{-1}{-1}.
\frac{-a+1-\left(-\left(a-1\right)\right)}{a-2}
Tā te mea he rite te tauraro o \frac{-a+1}{a-2} me \frac{-\left(a-1\right)}{a-2}, me tango rāua mā te tango i ō raua taurunga.
\frac{-a+1+a-1}{a-2}
Mahia ngā whakarea i roto o -a+1-\left(-\left(a-1\right)\right).
\frac{0}{a-2}
Whakakotahitia ngā kupu rite i -a+1+a-1.
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