$u'\cdot t+u-3\cdot t^2=0$
$3a+2+a$
$\frac{\sin^2\left(x\right)-\cot^2\left(x\right)}{\cos^2\left(x\right)}=-\csc^2\left(x\right)$
$64y^4-25$
$b2+10b+25$
$e=\text{sen}.\cos.\text{csc}$
$\left(4\right)+\left(-18\right)$
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