What expression is equivalent to (r-7)^6?

Aflower has 26 chromosomes. to create a new flower, how many chromosomes would a sperm cell have? what is this process called? part 2: within a flower cell that has 26 chromosomes, how many chromosomes would a cell that is created within the stem of a flower as it grows, have? what is this process called?

Find the volume of the solid bounded by the plane z=0 and the paraboloid z=1-x^2 –y^2

2and 3 are angles. complementary vertical congruent supplementary