Simplification would be the correct command here.
Step 1: When you have an exponent next to a power that is linked to a parenthesis, it is distributed inside that parenthesis just like when you have the expression 2(x+3) = 2x +6
Remember that exponents multiply when you have an exponent that does not have a base (like 1/2) and it is linked right next to an exponent that does have a base (like 3)
3(631/2t3*1/2) = 3(631/2 t3/2)
That's all to it.
Remember that you cannot multiply inside a parenthesis until that exponent is distributed! For example, you cannot multiply 3 and 63 before you raise 63 to the 1/2 power.