$\int\left(1-csc\:t\:\:cot\:t\:\right)dt$
$4.2-4.5$
$\int_{-2}^0\left(\frac{1}{3x^2}\right)dx$
$2000-600-220$
$z^2-6z+10=0$
$x\cot^22x^2$
$4 x ^ { 10 } - 36 \times 5 x + 81$
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