$\lim_{x\to\frac{\pi}{2}}\left(\frac{1-\sin\left(x\right)}{\frac{\pi}{2}-x}\right)$
$\frac{dy}{dx}=2y-6y^2$
$-7sin^2+4sin=-3$
$4x^2-5x+10\:\:\:\:\:$
$\lim_{x\to0}ln\left(\frac{e^x-1}{e^x-1}\right)$
$\frac{3x^3+6x^2+x+2}{x+1}$
$\left(a^2-10\right)^3$
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