$10\sin\left(x\right)\cos\left(x\right)=-6\sin\left(x\right)$
$50+250-125$
$\left(4m^2-7n^4\right)\left(4m^2+7n^4\right)$
$\left(-9\right)+\left(5-4\right)-\left(7+2\right)$
$\left(\frac{1}{2}x+y\right)^4$
$y=\sqrt{2x}+3$
$\cos2x+2\sin^2x-1=0$
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