$x^2-1\cdot x^2+3x+2$
$\sin\left(a\right)^4-\cos\left(a\right)^4+2\sin\left(a\right)^2=1$
$m^2+3m-13$
$\int\:\frac{x^2+12x-9}{x^3-9x}dx$
$\frac{\sin\left(x\right)\cos\left(x\right)-sin\left(x\right)}{\cos\left(x\right)^2-1}$
$4a^3w+20a^2w^2+25aw^3$
$n^3-3n^2-4n$
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