Whakaoti i te 12+(3+(-4+5-7+3(4-2(2))+8-12)+2-7)=

$$12 + ( 3 + ( - 4 + 5 - 7 + 3 ( 4 - 2 ( 2 ) ) + 8 - 12 ) + 2 - 7 ) =$$

Aromātai

$$0$$

Ngā Upane Otinga

Tāpirihia te 12 ki te 3, ka 15.

$$15-4+5-7+3\left(4-2\times 2\right)+8-12+2-7$$

Tangohia te 4 i te 15, ka 11.

$$11+5-7+3\left(4-2\times 2\right)+8-12+2-7$$

Tāpirihia te 11 ki te 5, ka 16.

$$16-7+3\left(4-2\times 2\right)+8-12+2-7$$

Tangohia te 7 i te 16, ka 9.

$$9+3\left(4-2\times 2\right)+8-12+2-7$$

Whakareatia te 2 ki te 2, ka 4.

$$9+3\left(4-4\right)+8-12+2-7$$

Tangohia te 4 i te 4, ka 0.

$$9+3\times 0+8-12+2-7$$

Whakareatia te 3 ki te 0, ka 0.

$$9+0+8-12+2-7$$

Tāpirihia te 9 ki te 0, ka 9.

$$9+8-12+2-7$$

Tāpirihia te 9 ki te 8, ka 17.

$$17-12+2-7$$

Tangohia te 12 i te 17, ka 5.

$$5+2-7$$

Tāpirihia te 5 ki te 2, ka 7.

$$7-7$$

Tangohia te 7 i te 7, ka 0.

$$0$$

Tauwehe

$$0$$