What is the simplified form of the expression? 5 c squared d minus 4 c plus 3 d minus 3 plus 2 c squared d minus 3 c plus d minus 7

Combine like terms: the c²d terms give 5 + 2 = 7, and the c terms give −4 − 3 = −7. The d terms give 3 + 1 = 4, while the constants give −3 − 7 = −10, so the simplified expression is 7c²d − 7c + 4d − 10, choice D.

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