Let x = 10, y = 4, z = 2, and evaluate the following
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1)x + 2(y + z)
=
2) (x + 2)–2(y + z)
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3) x − 3(y − z)
=
4) (x − 3)(y − z)
=
6) x^{2} − y^{2 }+ 3z^{2}
=
6) x^{3} −6yx–3xy^{z}
=
7) 2x(x+5y–7)+x(z-5)
=
8) 2z(−3z+z^{2}) −3z^{2}(−4−2z)
=
9) 2x(2x – 3y + z) + 2z(5x − y + 1)
=
10) 2xyz^{2}+2z(5x − y + 1)
=