Datrys (15-4)+3-(12-5*2)+(5+16div4)-5+(10-2^3)=

$$( 15 - 4 ) + 3 - ( 12 - 5 \times 2 ) + ( 5 + 16 \div 4 ) - 5 + ( 10 - 2 ^ { 3 } ) =$$

Enrhifo

$$18$$

Camau Ateb

Tynnu 4 o 15 i gael 11.

$$11+3-\left(12-5\times 2\right)+5+\frac{16}{4}-5+10-2^{3}$$

Adio 11 a 3 i gael 14.

$$14-\left(12-5\times 2\right)+5+\frac{16}{4}-5+10-2^{3}$$

Lluosi 5 a 2 i gael 10.

$$14-\left(12-10\right)+5+\frac{16}{4}-5+10-2^{3}$$

Tynnu 10 o 12 i gael 2.

$$14-2+5+\frac{16}{4}-5+10-2^{3}$$

Tynnu 2 o 14 i gael 12.

$$12+5+\frac{16}{4}-5+10-2^{3}$$

Adio 12 a 5 i gael 17.

$$17+\frac{16}{4}-5+10-2^{3}$$

Rhannu 16 â 4 i gael 4.

$$17+4-5+10-2^{3}$$

Adio 17 a 4 i gael 21.

$$21-5+10-2^{3}$$

Tynnu 5 o 21 i gael 16.

$$16+10-2^{3}$$

Cyfrifo 2 i bŵer 3 a chael 8.

$$16+10-8$$

Tynnu 8 o 10 i gael 2.

$$16+2$$

Adio 16 a 2 i gael 18.

$$18$$

Ffactor

$$2\times 3^{2}$$