$-77+-74$
$12z+9x-7+\left(-5z\right)-4x$
$x^2-36>0$
$\lim_{x\to\infty}\left(\frac{x^2+2\cos\left(x\right)-2}{3x^4}\right)$
$\frac{dy}{dx}=\frac{\left(5x^2+3x\right)}{y^2}$
$\frac{d}{dx}\left(x^{7xsinx}\right)$
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