$1^7$
$\left(a+b-c\right)\left(a-b-3c\right)$
$\frac{x^2-4x+4}{x^2-x-12}$
$\int-1\sin\left(x\right)\cos\left(x\right)dx$
$\left(k-b\right)^7$
$\cos^2x+2\cos x=0$
$x^2+3x-130$
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