=(2^1/3+6^1/2)^6
=[(2^1/3+6^1/2)^2]^3
=(2^2/3+2^4/3*6^1/2+6）^3
=[2^2/3(1+2^2/3*6^1/2)+6)^3
=4(1+2^2/3*6^1/2)^3+3*2^4/3(1+2^2/3*6^1/2)*6+3*2^2/3(1+2^2/3*6^1/2)*36+216
=4(1+3*2^2/3*6^1/2+18*2^4/3+4*6^3/2)+18*2^4/3+72*6^1/2+118*2^2/3+236*2^1/3*6^1/2+216
=200+12*2^2/3*6^1/2+72*2^1/3+332*6^1/2+118*2^2/3
约=200+36+75+492+170
=973