Answer:
options 2, 4 and 6
Step-by-step explanation:
standard form means there are no fraction coefficients, that they are ordered from greatest exponent to smallest, and by the letters of alphabet
1)
x^2*y^3+y^1+3x^1*y^2
should be x^2*y^3+3x^1*y^2+y^1
2) in standard form
3)
4x*y+2x^2*y^2+x*y^3
should be 2x^2*y^2+x*y^3+4x*y (if there are same exponents of x, put in order of decreasing y coefficients)
4) in standard form
5)
14b^3+a^1*b^3-6a^1*b^1+8a^1*b^2
should be a^1*b^3+8a^1*b^2-6a^1*b^1+a^0*14b^3 (14b^3 is last, since descending a exponents are the priority, and it has a^0 while rest have a^1)
6) in standard form
