$2\left(1-\cos^2b\right)+\cos^2b=1+\sin^2b$
$2x^2+x^2-12x-3$
$\frac{dy}{dx}=2\left(2-y\right)$
$\left(\sqrt{2x}+3x^2+y\right)^2$
$sin^2x+sin^2x\cot\left(x\right)$
$\left(-9\right)\left(-12\right)\left(-2\right)$
$\sin=3$
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