$\sin\left(b\right)\left(\tan\left(b\right)+\cot\left(b\right)\right)=\sec\left(b\right)$
$36x^4-148x^2+16=0$
$\left(cotx+cscx\right)\left(tanx-senx\right)=tanx\cdot\:\:senx$
$\frac{3+x^2}{x}$
$y'+3xy^3=0$
$-\frac{9.5}{-2.5}$
$169x^{16}-144y^4$
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