Evaluate
3k+a+6ak-4a^{2}
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3k+a+6ak-4a^{2}
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2a^{2}+6ak+a+3k-7a^{2}+\left(a-2a\right)^{2}
Use the distributive property to multiply 2a+1 by a+3k.
-5a^{2}+6ak+a+3k+\left(a-2a\right)^{2}
Combine 2a^{2} and -7a^{2} to get -5a^{2}.
-5a^{2}+6ak+a+3k+\left(-a\right)^{2}
Combine a and -2a to get -a.
-5a^{2}+6ak+a+3k+\left(-1\right)^{2}a^{2}
Expand \left(-a\right)^{2}.
-5a^{2}+6ak+a+3k+1a^{2}
Calculate -1 to the power of 2 and get 1.
-4a^{2}+6ak+a+3k
Combine -5a^{2} and 1a^{2} to get -4a^{2}.
2a^{2}+6ak+a+3k-7a^{2}+\left(a-2a\right)^{2}
Use the distributive property to multiply 2a+1 by a+3k.
-5a^{2}+6ak+a+3k+\left(a-2a\right)^{2}
Combine 2a^{2} and -7a^{2} to get -5a^{2}.
-5a^{2}+6ak+a+3k+\left(-a\right)^{2}
Combine a and -2a to get -a.
-5a^{2}+6ak+a+3k+\left(-1\right)^{2}a^{2}
Expand \left(-a\right)^{2}.
-5a^{2}+6ak+a+3k+1a^{2}
Calculate -1 to the power of 2 and get 1.
-4a^{2}+6ak+a+3k
Combine -5a^{2} and 1a^{2} to get -4a^{2}.
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