$sin\:x\:\left(1+tan\:x\right)=tan\:x\left(sin\:x+cos\:x\right)$
$9x^2+6x+5$
$8^{-1}\cdot8^4$
$\lim_{x\to1}x^2+2$
$\lim_{x\to+\infty}\left(\frac{\sqrt{x+1}}{e^x}\right)$
$\left(y=\frac{e^{x^2+1}3^x}{cos\left(x\right)}\right)$
$x^2+5x+8$
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