$22-4.\left(9+-3.2\right)=10$
$\frac{1}{2}x^2-5x=18$
$\lim_{x\to\frac{\pi}{2}}\left(4\cos\left(3x\right)\sec\left(5x\right)\right)$
$a-\frac{b^2}{a}\cdot1-\frac{b}{a+b}$
$\int\left(8x+3\right)^2dx$
$-63x^2-4x^4\left(4+x^2\right)$
$x^{6\:}-\:6x^3\:-\:2x^2$
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