$4x^2+x+5=0$
$\frac{2}{5}x-3\ge2x+8$
$\left(\frac{3}{5}x+\frac{4}{9}\right)^2$
$\frac{d}{dx}4e^{5x}$
$1+yx+x^2\frac{dy}{dx}$
$6a=18$
$3\csc^2x$
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