$26\sin\left(x\right).\cos\left(x\right)-13\sin\left(x\right)=7$
$\frac{dy}{dx}=\frac{-\left(2y^2-3\right)}{\left(2x-2\right)}$
$2a-8ab$
$\lim_{x\to\infty}\left(\frac{\sqrt{x}}{ln\left(x+1\right)}\right)$
$\frac{3}{2}a-a$
$x^2+10x+20=5$
$8x-0.02x^2$
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