$\frac{d}{dx}\left(\sqrt{\left(\frac{x}{x+1}\right)^2+9}\right)$
$\int_1^{\infty}x^2dx$
$5x^4+3x^2y-9xz-15x^3z$
$\left(-0.2x-1\right)^2$
$x2\:-\:2x\:-\:80\:\ge\:0$
$\left(2y+3y^2\right)^3$
$\left(a^2b^4\right)^2\left(-c^5d^3\right)^2$
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