$y^2+4\ge0$
$25a^2+90at+81t^2$
$\frac{x^{2\:}+1}{x^2}$
$\csc\left(x\right)^2-1\cdot\tan\left(x\right)^2+1$
$q^2-24q+80$
$\frac{dy}{dx}=4\ln\left(x^4\right)\ln\left(y\right)$
$-15a^xm+9y-2a^xm-6y$
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