$-10t-1\ge9$
$\frac{csc^2a}{1-sen^2a}=csc^2a+sec^2a$
$\frac{3}{8}\left(\frac{16}{9}y+\frac{32}{27}z-\frac{40}{9}\right)$
$25a^4-9c^2$
$3+6-11+8+8+13$
$f\:'\left(x\right)=\:\left(x-\frac{1}{x}\right)^2$
$\sin^2\cdot\sec^2\cot^2=1$
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