$-56+4$
$\frac{dy}{dx}=2\cdot\left(x+y\right)$
$18\:x\:\left(-12\right)$
$6x+2<3x+14$
$2\sin\left(x\right)=\frac{1}{\sin\left(x\right)}-1$
$e=4\sin\left(x\right)\cos\left(x\right)\cos\left(2x\right)$
$x^4-10x^2-9$
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