That verbal expression would read: 3(x+y)^2 + 5(2x -y)
^2 means 'squared' in the above example.
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3x2 can be called "three times x squared", "three x squared", or "three times x to the power of two".
Three times the difference of a and m divided by twice their sum is equal to 6(a squared - m squared). 3(a - m)/2(a + m)
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(3y2)4*3y2*3y2*3y2*3y2 = 38*y16 = 6561y16
16 to the 4th power, or 16 x 16 x 16 x 16 = 65,536