Answer:
[tex]\dashrightarrow \: { \tt{ - 4 {t}^{5}(6 {t}^{5}) }}[/tex]
• from law of indices:
[tex]{ \rm{( {x}^{a})( {x}^{m}) = {x}^{(a + m)} }}[/tex]
• therefore:
[tex]\dashrightarrow \: { \tt{( - 4 \times 6)( {t}^{5} \times {t}^{5} ) }} \\ \\ \dashrightarrow \: { \tt{ - 24 {t}^{(5 + 5)} }} \\ \\ \dashrightarrow \: { \boxed{ \tt{ - 24 {t}^{10} }}}[/tex]