$1\cdot n$
$sin\left(x\right)^2-cos\left(x\right)^2=\sin\left(x\right)$
$6-3\cdot2+4\cdot1-5+13-8$
$-2xy^2+8xy^2$
$343-8a^3$
$\frac{x^4-2x^2+1}{x+1}$
$b^3-a^3$
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