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Exercise

$7\cdot4^3+8\cdot4^2+-8\cdot4+-1$

Step-by-step Solution

1

Multiply $8$ times $-4$

$7\cdot 4^3+8\cdot 4^2-32-1$
2

Subtract the values $-32$ and $-1$

$7\cdot 4^3+8\cdot 4^2-33$
3

Combining like terms $7\cdot 4^3$ and $8\cdot 4^2$

$15-33$
4

Subtract the values $15$ and $-33$

$-18$

Final answer to the exercise

$-18$

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$5a-6b+8c+9a-20c-b+6b-c$

$5a+2b-3a+4$

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Main Topic: Equivalent Expressions

Two algebraic expressions are equivalent if they stay equal to each other, for any values their variables can take.

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