$\frac{x+4}{5x+5}$
$x^{lnx-1}\left(lnx^2\right)=x^{lnx-1}\left(2lnx\right)$
$\sqrt{a-7}=a$
$\left(x+2a+y\right)^2$
$379.4\:x\:28$
$\frac{dy}{dx}=\frac{ye^x}{\left(1+y^2\right)}$
$\int2x-11\left(x^3+2x^2\right)dx$
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