$\left(x^{3y^2}-5\right)\left(x^3y^2+5\right)$
$6a^2bc^3\:.\:7ab^2c^4$
$\int3t^2dt$
$\cot b=\frac{14}{11}$
$sin\frac{\pi\:}{9}cos\frac{2\pi\:}{9}+cos\frac{\pi\:}{9}sin\frac{2\pi\:}{9}$
$17-x=6$
$60\cdot8$
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