$125x-0.1x^2$
$sec^2x+3=tan^2x+4$
$\frac{x^2-13x+40}{x+8}$
$-4+\sqrt{2x}$
$\left(n+1\right)\left(a+2\right)$
$f+3+4-5f$
$2sinx+1=cscx$
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