Question 198380
{{{(5sqrt(3)-15sqrt(5))(4sqrt(3)+12sqrt(5))}}}
{{{(5sqrt(3)(4sqrt(3)+12sqrt(5)))-(15sqrt(5)(4sqrt(3)+12sqrt(5)))}}}
{{{(20sqrt(3)^2+60sqrt(15))-(60sqrt(15)+180sqrt(5)^2)}}}
{{{(60)-(900)=-840}}}

Multiply and simplify ^3 sq rt y^4 * ^3 sq rt 16y^5
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What?