$\lim_{x\to9}\left(\frac{x^{3}-6x^{2}-22x-45}{x-9}\right)$
$\int_2^3\frac{1}{\left(2x+y-3\right)^3}dy$
$\int ( 3 x - 5 ) ^ { 3 } 3 d x$
$\int x.y\:dy$
$4x+1\le9$
$2x^2+9x=x-14$
$\left(3x-5y+2z\right)^2$
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