$\left(tan\:x\:+cot\:x\right)\:to\:sec^2x\:+csc^2x$
$x+8=5\left(2x+7\right)$
$6x+6x+6x+6x+6x+6x$
$\left(-29\right)-\left(-42\right)$
$x^3\frac{dy}{dx}+3x^3y=x$
$4x\left(x+3\right)\ge-5$
$150x^2-300x+150$
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