Write brackets ( ) in this statement to make each statement correct. You may use more than one pair of brackets in each statement.
2+7×3+4=512 + 7 \times 3 + 4 = 512+7×3+4=51
4×3+2=204 \times 3 + 2 = 204×3+2=20
9−7×3+5=169 - 7 \times 3 + 5 = 169−7×3+5=16