$-5b+9=19$
$\frac{x-2}{7}-\frac{3-x}{7}$
$1-\sin^2x-3\sin^2x=0$
$\frac{1}{2}.\sin\left(\frac{\pi}{2}\right)$
$32-16-\left(-14-6\right)$
$\int\left(x+9\right)^4\left(x+2\right)dx$
$\int\frac{\sec\left(x\right)^5}{\csc\left(x\right)}dx$
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