$\int\frac{x^2}{\left(x-1\right)^2\left(x+1\right)^2}dx$
$\sec\left(x\right)+5=7$
$\int_1^2\left(\frac{4}{x^2-9}\right)dx$
$\left(x-2\right)\left(x-3\right)<0$
$8x^3-24x^2+24x-8$
$\frac{4}{25}a^4+\frac{4}{25}a^2b+\frac{1}{9}b^2$
$\frac{26x^2z}{2x^2}$
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