$\frac{d^2y}{dx^2}+3\left(\frac{dy}{dx}\right)+2y=x^2$
$\frac{2x+2-x}{x^2+1}$
$\sin\left(\frac{90}{1.4}\right)$
$\left(3.7v^3w^2\right)-\left(12.3v^3w^2\right)$
$x+13=-37$
$\int\left(\frac{\sqrt{\left(x^2+9\right)}}{x^2}\right)dx$
$\left(5-3\sqrt{x}\right)^2$
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