$2.9903+0.8907$
$\frac{1}{x-2}+4=\frac{9}{x-2}$
$9x^2+3x-2+x$
$-\left(x+1\right)\left(1-x\right)$
$2x^3-7x^2+3x$
$\int\frac{1}{\left(y^2-1\right)^2}dy$
$\int x\csc^2x\cdot dx$
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