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Simple exercise in collecting terms in different powers of \\(x\\)

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### Simplify the following expression by combining \"like\" terms.

The idea is to collect together and combine any terms that are the same kind of term so:

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\$\\var{b}\$ and \$\\var{f}\$ are ordinary numbers. We can combine them to get \$\\var{b+f}\$

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We can combine \$\\var{a}x\$ and \$\\var{d}x\$ to get \$\\var{a+d}x\$.

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There are also \$\\var{c}\$ times \$x^2\$. So our answer is:

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\$\\simplify{{c}x^2+{a+d}x+{b+f}}\$

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\$\\simplify[!collectNumbers]{{a}x+{b}+{c}x^2+{d}x+{f}}\$

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