$tan\:x\:sec\:x=tan^2x\:cscx$
$\left(t^2-12t+11\right)\frac{dy}{dx}=y$
$\sin\left(x+270\right)=-\cos\left(x\right)$
$25y+12y-31y-8y+5y$
$4-16-1+8$
$3x^2+3y^2=-6$
$25+\frac{5^2}{5}$
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