$x-10+9$
$7s-2s-s$
$\frac{3x^4+0x^3-3x^2+x-5}{x^2+3}$
$\int\left(\frac{x}{\left(x^2-1\right)^2}\right)dx$
$\left(12n-6b\right)^2$
$-12x-38<-200$
$-4n-8=4\left(-3n+2\right)$
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