Add/Subtract Polynomials

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Simplify $\left(4r^{2}+r+5\right)-2\left(8r^{2}-5r+1\right)$

**Answer**

$\;\;\;\left(4r^{2}+r+5\right)-2\left(8r^{2}-5r+1\right)$

$=4r^{2}+r+5-16r^{2}+10r-2$

$=(4r^{2}-16r^{2})+(r+10r)+(5-2)$

$=-12r^{2}+11r+3$