$1-cos\left(t\right)-2cos\left(t-\frac{b}{2}\right)-cos\left(t-b\right)$
$\int\left(2x^2\sqrt{x^2-1}\right)dx$
$\int\frac{1}{x\sqrt{1+4x}}dx$
$-24+94$
$\frac{dp}{dx}=a\left(1-x\right)$
$\lim_{x\to2}\left(\frac{4-\sqrt{x}}{x^2-5x+6}\right)$
$8f-5\left(-5f+3\right)$
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