$\int\frac{x+4}{x+9}dx$
$\frac{x^3+x^2-5x+3}{x^3+2x^2-7x+4}$
$-7x+15\le-5x+1$
$28j+20-14j+10-12$
$\frac{\left(2n+3\right)x^{2n+1}\left(-1\right)^n}{2n+1}$
$\frac{12x^{7}y^{8}}{4x^{3}y}$
$\left|+3+4\right|-\left(-1\right)$
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