$$( 3 a + 4 b + 5 c ) ^ { 3 }$$
$27a^{3}+144ab^{2}+360abc+225ac^{2}+64b^{3}+108ba^{2}+300bc^{2}+125c^{3}+135ca^{2}+240cb^{2}$
$\left(3a+4b+5c\right)^{3}$
