$\int k^3\sin\left(3k\right)dx$
$\left(b^2+\frac{1}{2}\right)^2$
$\int\frac{x+4}{x^2-7x-8}dx$
$2x\:-\:5\:<\:9$
$u\left(x\right)=\left(x^3-8\right)\left(1+x^2\right)$
$2cos4xcos2x$
$42x^2+30y^2-10=0$
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