perform the indicated operation and simplify it: pa help po need q na po now e thankss<33

1.) (3y)(3y)(3y)(3y)(3y)(3y)(3y)(3y)(3y)=
2.) (3x3)(4x)=
6.)(a⁴b³)8= (squared po yung 8)
7.) (-3p²qr²)(15pq⁴r¹=
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