$4-9+6-2+3$
$f\left(x\right)=4\sin\left(7x^2-\pi\right)-2\cos\left(4x^3+\pi\right)$
$4.1+-3.3$
$u\left(n-4\right)$
$\tan\left(x+\left(\frac{3\pi}{2}\right)\right)=-\cot\left(x\right)$
$\int\frac{6-x}{x^2-36}dx$
$4cosx=5tagx$
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