$210-450-630+240$
$\int sec\left(6x+69\right)\left(tan\left(6x+69\right)\right)dx$
$3-\left\{4-5+\left[-1+2-\left(-3+4\right)-5\right]-10\right\}-6$
$\sec^2\left(1\right)+\csc^2\left(1\right)=\sec^2\left(1\right)\csc^2\left(1\right)$
$\frac{10m^2n}{mn}$
$x^4-101x^2+100x$
$\left(6d+2\right)\left(6d-8\right)$
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