$1 x - 2$
$-36x^4+72x^3-11x^2-25$
$\int x\sqrt{4x^2+40x+98}dx$
$3x^3+5x^2-12x-20$
$\int\frac{x^2}{\left(x+1\right)\left(1-x\right)}dx$
$45\cdot101$
$78x+6-2$
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