Subtract a⁴+a³+a²+6a-3from the sum of 7+6a⁴-4a-7a³and -a⁴+a-3
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The sum of 7+6a⁴-4a-7a³ and-a⁴+a-3
=(6a⁴-7a³-4a+7)+(-a⁴+a-3)
=6a⁴-7a³-4a+7-a⁴+a-3
=6a⁴-a⁴-7a³-4a+a+7-3
=5a⁴-7a³-3a+4
Subtracted a⁴+a³+a² +6a-3 from the sum(5a⁴-7a³-3a+4)
=(5a⁴-7a³-3a+4)-(a⁴+a³+a²+6a-3)
=5a⁴-7a³-3a+4-a⁴-a³-a²-6a+3
=5a⁴-a⁴-7a³-a³-a²-3a-6a+4+3
=4a⁴-8a³-a²-9a+7 (Ans)
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