1
(9-2p^4)²=81-36p^4+4p^8
2
(x^π-y^π)(x^π+y^π)/(x^π+y^π)=x^π-y^π
3
(2-6c-3)(2+6c+3)=(-1-6c)(5+6c)
4
(7m+12p)²
5
1)5 4/45-4 1/15=5 4/45-4 3/45=1 1/45
2)1 1/45*22 1/2=46/45*45/2=23
3)4,25:0,85=5
4)5+0,5=5,5
5)5,56-4,06=1,5
6)1,5:3=0,5
7)5,5:0,5=11
8)23+11=34