$\frac{\ln\left(2x+3\right)}{\frac{2}{\sqrt{2x+3}}}$
$\frac{25x^2}{16}-10xy+16y^4$
$-4k^4+14+3k^2+\left(-3k^4-14k^2-8\right)$
$3x+14>20-8x$
$\csc a-\sin a\:\cot\cos a$
$\frac{2x^{-2}y^{-4}}{7x^{-1}y^{-2}}$
$\frac{1}{4}a-4a^{-1}=0$
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