$\int x\cdot sin^3\left(5x+2\right)dx$
$\lim_{x\to+\infty}2x^2+3x-1$
$5\left|-4+4\right|+3\left|-3+8\right|$
$25-\left(-5\right)-13+6$
$\sin\left(x\right)+\cos\left(x\right)=\frac{\sqrt{2}}{2}$
$2x-5x+8x$
$\frac{\sec^2a\cos\tan a}{\cos\sec}=\tan a$
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