$4\:+\:4k\:-\:8k\:-\:6\:+\:17\:$
$20x^3-30x^2$
$\left(sa+3b\right)\left(3a+5b\right)$
$0.375+2.75$
$y'\cosh^2\left(x\right)-y\cosh\left(2x\right)$
$\frac{2x+3}{5}>x+2$
$\int\:\left(\frac{1}{x^4\sqrt{x^2-4}}\right)dx$
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