Question

(-5a⁴bc³).(-b² c).(4a² c)

Answer 1

(-5a⁴bc³).(-b² c).(4a² c)
 
+20a⁶b³c⁵

Answer 2

$(-5a^{4}bc^{3}). (-b^{2}c) . (4a^{2}c)$
$- (-5a^{4}b^{3}c^{4}) (4a^{2}c)$
$20a^{6}b^{3}c^{5}$