5(5a + c) = (2t - 6k)9=
(a + 6b)d: 7(a +6b-3c) =
4(y + 0,1x-5xy)=
(x-2-y)2a=
. -0,2(n-10m +5m²) =
O-3a²(2b-0,6c² - 2d ³) =
ab(c-b+ bc + ac) =
(nmx + xn+n + 2xnm²)2n =
(ab³-3b¹a + 5a²-a)a²b =
-xyz(-x+y-2)=
5xyzn(-5x-3y + 4z² -0,1n) = x²y^(-2y6-5xz-6zxy)=
-a³b6(-2a³b5-6a² +10b7)=
4kn¹¹(0,3k7 -0,7kn³ +0,5nk³)= abcd(a¹b²d4+b³c²d²)=​