$3x+2x+5x$
$tan\left(\frac{2.5868}{2}\right)$
$\left(-\:\frac{2}{9}\:b\:\right)\left(\frac{3}{4}\:a\:-\:\frac{5}{4}\:b\right)$
$\frac{1}{\csc\:\left(y\right)}\frac{dy}{dx}\:=-\frac{1}{\sec\:^2\left(x\right)}$
$\frac{tan^2a}{seca+1}+1=sec\:a$
$y'+y=sent$
$\int\:\frac{x^2+2x+1}{x^4+6x^2+9}dx$
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