$sin\:7x\:cos\:4x$
$\left(x^2-xy+y^2\right)\left(x^2y^2+xy\right)$
$\int_0^{\frac{\pi}{6}}\left(secx-cosx\right)^2dx$
$fb=n$
$\frac{10}{\left(1+10x\right)^2}$
$8x-9+8x+23$
$28nb+7nb-12nb-3nb$
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