$2x^3+2x^2-3x+2$
$3a-4a+5a-7a+12a$
$\int_0^1\left(6x-7\right)\left(3x^2-7x\right)dx$
$0.5x-18=50$
$2cos\left(x+\pi\right)+1$
$\left(x^2-3y\right)\left(x^2+3y\right)$
$\left(x+y+zx+y-z\right)$
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