$\lim_{x\to1}\left(\frac{\sqrt{1-x^2}}{\sqrt{1-x^3}}\right)$

$\frac{d}{dx}\left(x^2+4xy-3x+y^2+y=2\right)$

$\infty^2-\infty$

$x^2+12>8x$

$-107+25$

$\frac{sin2x-sinx}{2cos^2x+cosx-1}=\tan\left(\frac{x}{2}\right)$

$\left(62.4\:\right)\int_{-4}^4\left(x\right)\:\left(\sqrt{16-x^2}\right)dx$