Assignment:
Evaluate the following integrals:
(1) The integral of (6sin[2x])/sin(x)dx=____+C
(2) The integral of (7-x)(3+[x^2])dx=____+C
(3) The integral from 3 to 7 of ([t^6]-[t^2])/(t^4)dt=____+C
(4) The integral of (6sin[x])/(1-sin^2[x])dx=____+C
Provide complete and step by step solution for the question and show calculations and use formulas.