$y=-\sin\left(\frac{\pi}{2}-\frac{5\pi}{3}\right)+\frac{5}{2}$
$4\sin x=2\sin x+1$
$a^2\cdot a$
$-4\left(-3z-2\right)-9$
$12cos^2x-9=0$
$\frac{x^3-x+1}{x+1}$
$\int\frac{\cos\left(x\right)}{1-sin^2x}dx$
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