$\sec\left(240^{\circ}\right)$
$\frac{3x-26}{77}=\frac{2}{7}$
$-500-2+50-5-1$
$x^2-4x-45=0$
$10v^2-23+12$
$\frac{25\cdot3.317}{6}$
$\int\frac{1}{sqrt\left(81-x^2\right)}dx$
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