$\lim_{x\to2}\left(\frac{x^{2}-5x+6}{x-2}\right)$
$\left(6a^3-7b^4\right)^2$
$\int_1^{+\infty\:}\left(\frac{1}{x^3\sqrt{x^2+1}}\right)\:dx$
$\int\:cot^{-1}\:4t\:dt$
$-7\cdot4\cdot8$
$\int x\left(\sqrt[3]{1-4x}\right)dx$
$\frac { 20 x ^ { 4 } } { 9 } - \frac { 2 x ^ { 2 } } { 3 } + \frac { 1 } { 25 }$
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