Hope I understand your notation correctly.

1.) -2*4^(1/4)*3^(1/3)

-2*sqrt(2)*3^(1/3)

2.) sqrt(10)*2*100^(1/3)

sqrt(10)*2*10^(2/3)

10^(1/2)*2*10^(2/3)

20*10^(1/6)

3.) 7^(1/3)*7^(1/4)

7^(7/12)

And I'll complete the others later during my lunch break- let me know if that's the notation you intended.