$\sec x+\tan x+\frac{1}{\sec x+\tan x}=2\sec x$
$\left(2^8\right)^7$
$\log_{18}\left(x+5\right)+\log_{18}\left(x-2\right)=1$
$-9+10+4+5+6$
$\left(b-7c\right)^2$
$\int\sqrt{\left(3x-2\right)}\cdot dx$
$\left(3x^2+4xy-3x^2y+6x\right)dx+\left(2x^2-x^3\right)dy=0$
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