Please tell me how to solve this problem and tell me what equation u used

1 1. Find the indefinite integral below. (3e3/1- 4sin(41)j + 18cos(3t) k) dt Do not include an arbitrary constant vector. 12. Find the total differential for the function w = 6z ysinx. 13. Find the directional derivative of the function at P in the direction of v. fx, y, z) = yx + yz + xz, P(1, 1, 1), v= 6i + 10j -9k 14. Convert the following point from cylindrical coordinates to rectangular coordinates. 14 , - 10 7 3 2 15. Find the distance between the planes given below. 5x - 3y + 3z - 38=0 15x - 9y + 9z - 30 =0