单项选择题

A、function y=f(x)f=5*x^2*sin(x)-exp(-x)
B、function y=f(x)y=5*x^2*sin x –e^(-x)
C、function y=f(x)y=5*x^2*sin(x)-exp(-x)
D、function y=f(x)f(x)=5*x^2*sin(x)-exp(-x)

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