$\sqrt{\frac{x^2+2x+1}{x^2-1}}$
$12\:-\:\left(-5\right)\:-\:4$
$0.004+389.4+39.456+0.5+16$
$\frac{dy}{dx}\left(y^3+y^2-5y-x^2=4\right)$
$\left(4x+3\right)\left(2x^2+3x+5\right)$
$2^{3.3219}$
$\frac{dy}{dx}=45yx^8$
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