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Simplify the following: 7x^3+8y^3-(4x+3...

Simplify the following: `7x^3+8y^3-(4x+3y)(16 x^2-12 x y+9y^2)`

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Given expression `'7x³+8y³-(4x+3y)(16x²-12xy+9y²)'`--------(1)
now, we know that `'(a+b)(a²+b²-ab)=a³+b³`
`(4x+3y)(16x²-12xy+9y²)`=`(4x)³ (3y)³ =64x³+27y³`'
substitute this value in (1),we get
→ `'7x³+8y³-64x³-27y³
=-57x³-19y³`.'
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