$x^2+8x+16=3$
$3.24x^2-0.81$
$\int\frac{1}{\left(x-1\right)x}dx$
$sec\:b\:+\:tan\:b\:=\:\frac{cos\:b}{1\:-\:sin\:b}$
$\lim_{x\to\infty}\left(\frac{lnx^2}{e^{2x}}\right)$
$2xy+y-6x-3$
$csc^2x\left(csc^2x-1\right)$
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