log math needed asap

1.)Change to exponents help me please. 
a.)log3 81=4
b)log4 1/256=-4

 
2.)Change to exponent:
a.)log3 81=4
b)5^7t=a+b/a
 
What is:
3.)log4  (3z) + log4x
 

4.)9^(x^2)=3^3x+2

5.)9^2x multiplied by (1/3)^x+2 =27 multiplied by (3^x)^-2

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