$t\frac{dx}{dt}-x=\sin\left(t\right)$
$y'=7x+y$
$\left(4b\right)^5\left(4b\right)^3$
$\frac{5x^2+33x+23}{x+6}$
$\left(x^2+3x-6\right)\cdot\left(-3x^3\right)$
$2r+2r$
$2x^2=-7x-29$
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