$x^2+6x+13<0$
$\left(x-\frac{5}{4}r\right)^2$
$x ^ { 3 } + 5 x - 5 x + 25$
$x ^ { 4 } - 2 x ^ { 3 } - 5 x ^ { 2 } + 6 x$
$3+2y+3x+3$
$f\left(x\right)=ak\left(\frac{x}{beta}\right)$
$\lim_{x\to-\infty}\left(\frac{x^3-1}{x^2}\right)$
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