$\int\cos\left(\frac{2x}{3}\right)dx$
$\int\frac{1}{\sqrt{x^2-2x+2}}dx$
$7ab12ab$
$\frac{4\left(3\right)+6}{2}$
$-6.03-10$
$25a^4+54a^2b^249b^4$
$a^2+b^2=145$
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