$x=y^2-2$
$\frac{dy}{dx}=1-cosx$
$\lim_{x\to0}\left(\frac{1+in\left(1+x\right)-e^x}{x^2}\right)$
$-15m+2m-3m+16m+5m-4m-m$
$\lim_{x\to0,5}\left(\frac{6x^2+5x-4}{4x^2+16x+9}\right)$
$\frac{6^2}{2^2}$
$3.e-\infty$
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