這題數點計

[(2x^2)^3 X (3x)^5]^2 / (9x)^7
=[2^3x^(2X3) X 3^5x^5]^2 / 9^7x^7
=[8x^6 X 243x^5]^2 / 4782969x^7
=[8^2x^(6X2) X 243^2x^(5X2) ] / 4782969x^7
=64x^12 X 59049x^10 / 4782969x^7
=59049 X 64 x^(12+10) / 4782969x^7
=3779136 x^22 / 4782969x^7
=3779136 / 4782969 x ^(22-7)
=64/81 x ^15

=0=個答案好似好唔正數咁，你再check下有無錯啦
希望幫到你^^

P.S.上面位人兄唔記得[(2x^2)^3 X (3x)^5]要^2 ><"

[(2x^2)^3 x (3x)^5]^2 / (9x)^7
=(8x^6)( 243x^5)/4782969x^7
=(1944x^11)/(4782969x^7)
=(9^2 )(24)x^4/9^7
=24x^4/9^5
=3 x 8 x^4/3^10
=8x^4/3^9//