$\lim_{x\to\infty}\left(\frac{\ln\left(1+e^{3x}\right)}{\ln\left(1+e^x\right)}\right)$
$2sinxcosx+1$
$8\cdot9+5$
$\int\frac{1}{\left(x+3\right)^3}dx$
$x2-3x^3$
$\left(y^2-4y+7\right)^2$
$\left(1+\tan\left(x\right)^2\right)\left(1-\sin\left(x\right)^2\right)=1$
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