Simplify
`(a) m^(-6)timesn^(-7)`
`(b) m^(-4)timesn^(-5)`

Simplify 2m(5m+4n)

Simplify 24 -: 6/7

Simplify and express the result in power notation with positive exponent: (a) "7^(5)times7^(3)-:7^(-4), (b) 6^(11)times6^(3)times6^(-5)

Simplify : 2(3)/(4)-1(5)/(6)

Simplify the following : (a) (-5)^3 (b) (-4)^5 .

Simplify: (-4(5)/(6))+(-7(3)/(4))

Simplify: (6m-n)(36m^(2)+6mm+n^(2))(3m+2n)^(3)