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(4 pts) Estimate the area under the graph of

`f(x)=(1)/(x+1)`

from

`x=1`

to

`x=2`

using four approximating rectangles and right endpoints. (12 points) Evaluate the integral.

`\int (3x^(2)+(3)/(x^(2))-(1)/(x)+5^(2))dx`

(

`:\int csc^(2)x-cosx+sinx`