$20x-7=5+14x$
$1+\cos^2x-\sin^2x=2\cos^2x$
$\int\frac{\left(x+3\right)}{\sqrt{x^2+6x+2}}dx$
$2\cdot\left(2-5\right)$
$\frac{dy}{dx}=\frac{1}{x},y\left(0.1\right)=0$
$\int\frac{8}{\left(3-4x\right)^8}dx$
$\lim_{x\to0}\left(\frac{1}{x}\right)^{\ln\left(1-x\right)}$
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