(-1/7a³b)³×(14ab³)^4/(-7a³b^4)²

[latex](- frac{1}{7} a ^{3} b)^{3}*(14ab ^{3} )^{4}:(-7a^{3}b^{4})^{2}=- frac{1}{7^{3}} a^{9}b^{3}*7^{4}*2^{4}a^{4}b^{12}:7^{2}a^{6}b^{8}= \ -7*2^{4}a^{13}b^{15}:7^{2}a^{6}b^{8}= - frac{16}{7} a^{7}b^{7}=-2frac{2}{7}a^{7}b^{7} \ [/latex]