$cos^2x=\frac{1}{2}sin2x$
$27x^2+36x+3$
$2y'+y=3t^2$
$5\ln6x^2$
$-17-\left(-14\right)+-35+-2$
$x^4-30x^2+238$
$x\frac{dx}{dy}=e^y$
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