$( 9 x ^ { 2 } - 49 x ) ^ { 2 }$
$\lim_{x\to4}\left(\frac{\left(x^2-4\right)}{\left(4-x\right)}\right)$
$-8a^2:4a$
$\int\:in\:3v\:dx$
$\int x^{12}dx$
$\left(2x^2+\:3r^2\right)^4$
$\int\left(160+t\right)\left(24\right)dt$
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