$\frac{2\left(\tan x-\cot x\right)}{\tan^2x-\cot^2x}=\sin2x$
$\left(\left(a-bp\right)e^{at0-at}+bp\right)^2$
$350-\left(15-12\right)-\left(19-13\right)-\left(15-14\right)$
$6x^2-15x$
$x+4+2x-1$
$\left(2x-9\right)\left(7x+1\right)$
$y..-36y=0$
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