$\int\cos\left(\ln\left(2x\right)\right)dx$
$-345-456$
$3x^2-42=0$
$\lim_{x\to0}\left(\frac{1}{2}-\frac{cos3x}{x^2}\right)$
$\sqrt{2}\sin\left(x\right)-2\sin\left(2x\right)=-\sin\left(2x\right)$
$\left(35\right)\left(43\right)$
$\sqrt{4x+9y}=0$
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