Q66: Add.<br>- <span class="ql-formula" data-value="9 x^{5}+5 x^{4}+6
Q67: Multiply.<br>- <span class="ql-formula" data-value="(x+10)(-5 x+5)"><span class="katex"><span
Q68: Multiply or divide and write scientific
Q69: Multiply.<br>- <span class="ql-formula" data-value="-8 x(6 x-7)"><span
Q70: Evaluate the polynomial.<br>- <span class="ql-formula" data-value="6-5
Q72: Evaluate the polynomial.<br>- <span class="ql-formula" data-value="4
Q73: Evaluate.<br>- <span class="ql-formula" data-value="9^{1}"><span class="katex"><span class="katex-mathml"><math
Q74: Multiply.<br>- <span class="ql-formula" data-value="\left(2 y^{2}-4\right)\left(2 y^{2}+4\right)"><span
Q75: Collect like terms.<br>- <span class="ql-formula" data-value="7
Q76: Perform the division.<br>- <span class="ql-formula" data-value="\left(x^{4}-625\right)