$\int\:sec^2\left(3x+y\right)dx$
$25v^2-30v+9$
$+6-4\cdot2$
$y^2-40y+400$
$\csc\left(\frac{x}{2}\right)-2=0$
$x^2\cdot x^7$
$x^2+20x+100=0$
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